Alexander Graham Bell, noting how the sun’s rays ignite paper only when focused in one place, advised, “Concentrate all your thoughts on the work at hand.” The ability to focus our attention, and synergize our work towards one single focus, makes us more successful, productive, and efficient. We are most productive when we can focus our energy and efforts toward one singular goal. This is also what made Jesus’s life so powerful; He thoughts, words and actions lined up. Many people struggle with this, thinking one thing, speaking another, and doing what we did not want to do. (Rom 7:19)
When Bill Gates first met Warren Buffett, their host at dinner, Gates’ mother, asked everyone around the table to identify what they believed was the single most important factor in their success through life. Gates and Buffett gave the same one-word answer: “Focus.” (See more in The Snowball by Alice Schroeder). 
When the eye of the body is single, the whole body will be full of light. Mat 6:22 ἁπλόος haplóos When the eye accomplishes its purpose of seeing things as they are, then it is haploús, single, healthy, perfect. Singleness, simplicity, the absence of folds.
Dictionary: Sincere, generosity, without guile, simple.
The Greek word for single-mindedness is ‘opthalmous haplous’. ‘Opthalmous’ means: simple, uncomplicated, not confusing, sound, healthy, focused without distraction on the object in view. It means ‘single file, straight behind the leader, without duplicity of motives & sincere. So if you are single-minded, you do not simulate or pretend, there is no dissimulation or self-seeking behind every action. Single-mindedness removes the blind spot in your rear view mirror!
The secular World-view tries to distract, blur, confuse, too many options, complicate. The Gospel, on the other hand, is simple, straightforward, reasonable, sincere, focussed on one thing – Jesus Christ
You will keep him in perfect peace, Whose mind is stayed on You Because he trusts in You. Isa 26:3 Another word for focus, is a conviction.
The enemy can only tempt you in the area where you are uncertain and doubtful.
He could not tempt Jesus, because of Jesus’ firm conviction of the Word, and who He was. What is your conviction?
Conviction: “mental state of being convinced”; that of “firm belief, a belief held as proven”.
Make your mind what you believe. NOW FAITH is the assurance (the confirmation, of the title deed) of the things [we] hope for, being the proof of things [we] do not see and the conviction of their reality [faith perceiving as real fact what is not revealed to the senses].
The Amplified Bible. (Heb 11:1). The opposite of faith is a double minded man is unstable in all His ways – (James 1:8)
Faith is Single focus
Holiness is Single focus
Godliness is single focus
Calling is single focus. (2 Pet 1:10)
Having single Focus makes you more accurate
(2Cor 10:6) “being ready to punish all disobedience when your obedience is fulfilled.”
By accuracy you gain authority.
By accuracy you increase your territory and influence.
By accuracy, you become more confident.
By accuracy you become more efficient
Poor spelling and grammar, influence people’s perception of you negatively. Jesus said: “Let your yes be yes, and your no, no” Mat 5:37 Mean what you say, then it will not be necessary to make an oath. (Mat 5:33-36) Do not swear (Mat 23:18-22) Jesus obedience to God was particular and specific. (Jesus can do nothing Joh 5:19-20, 30; 6:38; 8:28; 12:49; 14:10, 24, 31) This obedience is what ultimately gave Him all authority above all. (Eph 1:21; 2:9)
Years ago, I advised the Citrus Fruit Farmers, who are selling a perishable product, to upgrade their documentation during the Production Phase. This paper work, of what chemicals and fertiliser they have applied, with regular physical testing, would then become their proof to leverage better prices. This procedure would also protect
The RULE of the One Thing.
This is an excerpt from The Power of Habit: On a blustery October day in 1987, a herd of prominent Wall Street investors and stock analysts gathered in the ballroom of a posh Manhattan hotel. They were there to meet the new CEO of the Aluminium Company of America — or Alcoa, as it was known — a corporation that, for nearly a century, had manufactured everything from the foil that wraps Hershey’s Kisses and the metal in Coca Cola cans to the bolts that hold satellites together. A few minutes before noon, the new chief executive, Paul O’Neill, took the stage. He looked dignified, solid, confident. Like a chief executive, then he opened his mouth.
“I want to talk to you about worker safety,” he said. “Every year, numerous Alcoa workers are injured so badly that they miss a day of work. “I intend to make Alcoa the safest company in America. I intend to go for zero injuries.” By applying the “rule of one thing” O’Neill helped push Alcoa’s annual earnings from 20 cents per share in 1994 to $1.41 in 1999, when he stepped down. The Power of Habit: Why We Do What We Do, and How to Change, Charles Duhigg.
Multi-tasking makes you stupid, and waste more time.
Some research has been done that shows that multitasking not only wastes your time but makes you stupid. A study was done at the University of London back in 2005 (admittedly, a very small non-peer-reviewed study, but still) measured how stupid multitasking can make you. Psychiatrist Glenn Wilson took four men and four women and tested their IQ under quiet conditions and distracting conditions (phones ringing, e-mail arriving). During the tests, he measured the subjects’ skin conductance, heart rate, and blood pressure. And, interestingly, the mean IQ scores of the subjects dropped by more than ten points when in distracting environments. Even more interesting, the drop-off was worse for men than women. (Perhaps, for some reason, women are more habituated to distraction.) 
For what Reason/purpose did Jesus Come?
John 18:37 Jesus answered, “For this I have been born, and for this I have come into the world, to testify to the truth. Romans 3:25-26 God put [Christ] forward . . . to demonstrate His righteousness, because in the forbearance of God He passed over the sins previously committed; for the demonstration, I say, of His righteousness . . . so that He would be just and the justifier of the one who has faith in Jesus. Romans 15:8-9 Christ has become a servant to the circumcision on behalf of the truth of God to confirm the promises given to the fathers, and for the Gentiles to glorify God for His mercy. Thus Jesus came to show, demonstrate, a visible, physical template of the Truth – God. What is the Truth? The Truth is a person, His name is Jesus. (John 8:31) Jesus is the Word becoming flesh. The Truth is God’s Word. (Joh 1:1-3) Jesus spend most of His life, fulfilling scripture: “today… this word is fulfilled… (Luk 4:21) Doing the Word, will literally save your life. (Mat 7:24-28) Jesus was for us an example in this.
This glorified and pleased the Father. (John 12:27) Jesus said, “For this purpose I came to this hour. Father, glorify Your name.” (John 17:4) Jesus prayed, “I glorified You on the earth, having accomplished the work which You have given Me to do.” This is also the only way we can glorify God, and do the works that please Him. Believe in His Son. (John 6:28)
Jesus was focussed throughout his Earthly Ministry. (Mark 1:38) [Jesus] said to them, “Let us go somewhere else to the towns nearby, so that I may preach there also; for that is what I came for.” “His face was set for the journey to Jerusalem” (Luk 9:51& 53) Because of His ‘set’ focus, He could also finish His purpose. (Heb 12:2) and became an example that Paul followed, finishing his race in return. (2 Tim 4:7; 2 Cor 8:10-11)
The intend and cause of Christ coming as the demonstration of God’s will, was to save us:
(John 9:39) And Jesus said, “For judgment I came into this world, so that those who do not see may see, and that those who see may become blind” (but see John 3:17). (Matthew 5:17) Jesus said, “I did not come to abolish but to fulfil.” (Luke 19:10) Jesus said, “For the Son of Man has come to seek and to save that which was lost.” (1 Timothy 1:15) “Christ Jesus came into the world to save sinners.” (John 3:16-17) “For God so loved the world, that He gave His only begotten Son, that whoever believes in Him shall not perish, but have eternal life. For God did not send the Son into the world to judge the world, but that the world might be saved through Him” (Mark 10:45) “For even the Son of Man did not come to be served, but to serve, and to give His life a ransom for many.”
So that we may have “life, and have it abundantly.” (Joh 10:10) Hence, destroying the works and hold of satan on our lives. (1 John 3:8) “The Son of God appeared for this purpose, to destroy the works of the devil.”
Hebrews 2:14 “Since the children share in flesh and blood, He Himself likewise also partook of the same, that through death He might render powerless him who had the power of death, that is, the devil, and might free those who through fear of death were subject to slavery all their lives.”
Henceforth: This is our single-focus! Jesus Christ!
We are people who have had an encounter with Jesus. He changed everything! He became our life, our mission, our cause, our means-to-an-end, the sum of all things! We have abandoned our life of self, having found that only His life gives real meaning, fulfillment, peace, and joy!
A life centered on ‘self’ leads to struggle, either doing too much or too little. Trying, striving, and fighting to be better, yet dreadfully failing, over and over, again and again! We never seem to get it right, seeking comfort and peace, accomplishment and meaning in all the wrong places to end up empty again at the end. Exhausting our intellect, driving our will, forcing our habits, to end up with more questions than answers, more failures than solutions.
Jesus is the best way to DO life! His values, mindsets, habits, lifestyle, and focus is the best example of the perfect life! When we are the most like Him, we become the perfect spouse, parent, employer, and employee. When we live through His wisdom, life began to have meaning, and purpose. He is the solution to every problem. His life will save you!
We have nothing to give this world but JESUS! He is our pearl of great price. He is the ultimate treasure one can find. He is our connection to God; He is the door, the access, the entrance, the method, the religion, the steps, and means to make peace with God finally. He forgave us our sins and wrongs. He healed the wounds of a life of destruction and failure. He nourished us back to pure, innocent childhood. Discovering His life was our creational purpose since the beginning. (Rom 8:29)
 Scrum: The Art of Doing Twice the Work in Half the Time, Jeff Sutherland