“The purpose of life is to live meaningfully, productively, and emotionally–saturate. In other words, to live fully.”

"The Myths by Which We Live", in The Rotarian, Vol. 107, No. 3 (September 1965), p. 55
Variant: The purpose of life is not to be happy at all. It is to be useful, to be honorable. It is to be compassionate. It is to matter, to have it make some difference that you lived.

Hagakure (c. 1716)
Source: Hagakure: The Book of the Samurai
Context: There is surely nothing other than the single purpose of the present moment. A man's whole life is a succession of moment after moment. If one fully understands the present moment, there will be nothing else to do, and nothing else to pursue. Live being true to the single purpose of the moment.
Everyone lets the present moment slip by, then looks for it as though he thought it were somewhere else.

As Quoted in The Gerorgian Times in 2008 http://www.geotimes.ge/index.php?m=home&newsid=12354.eng

Source: Life, the Truth, and Being Free (2010), p. 32

Source: Awaken the Giant Within (1992), p. 511
Context: Live life fully while you're here. Experience everything. Take care of yourself and your friends. Have fun, be crazy, be weird. Go out and screw up! You're going to anyway, so you might as well enjoy the process. Take the opportunity to learn from your mistakes: find the cause of your problem and eliminate it. Don't try to be perfect; just be an excellent example of being human.

"K" (1963), introduction to The Trial by Franz Kafka
Language and Silence: Essays 1958-1966 (1967)

The Transhumanism Handbook, 2019