While a lot of things in this world have changed, the need for hustle has not. The requisite brow sweat may be more figurative these days, but time, focus, dedication, and determination will remain the eternal principles of success.

'Flow' is that special state, also called 'the zone', where you lose track of time, you become one with what you're doing, and your sense of self comes out stronger at the end. Activities involving your strengths are more likely to lead to this state. You'll produce better work, you'll do it more quickly, and of course, flow is also an enjoyable experience in itself.

You are always in 100 percent control and have 100 percent responsibility for everything that has occurred in your life as a result of your actions or inactions.

You have to be willing to give 100 percent with zero expectation of receiving anything in return. Only when you are willing to take 100 percent responsibility for making the relationship work, will it work. Otherwise, the relationship left to chance will always be vulnerable to disaster.

The master of the art of living makes little distinction between his work and his play, his labor and his leisure, his mind and his body, his education and his recreation, his love and his religion. He simply pursues his vision of excellence in whatever he does, leaving others to decide whether he is working or playing. To him, he is always doing both.