“I guess what I want to learn is how to live in this world and enjoy its delights but also devote myself to God.”

Source: Paris in Love

Source: Lioness Rampant

Variant: I did not care what it was all about. All I wanted to know was how to live in it. Maybe if you found out how to live in it you learned from that what is was all about.
Source: The Sun Also Rises

Paris Review interview (1986)
Context: I feel that after working a long time, I’ve really learned how to do what I do. I enjoy it. I don’t think there’s anything more satisfying than turning out a good stanza or a good piece of prose. And when you’re satisfied enough, you want to show it to other people. That’s called publication.

Source: Flight

Part 5: "The World of One Physicist", "But Is It Art?", p. 261
Surely You're Joking, Mr. Feynman! (1985)
Context: I wanted very much to learn to draw, for a reason that I kept to myself: I wanted to convey an emotion I have about the beauty of the world. It's difficult to describe because it's an emotion. It's analogous to the feeling one has in religion that has to do with a god that controls everything in the whole universe: there's a generality aspect that you feel when you think about how things that appear so different and behave so differently are all run "behind the scenes" by the same organization, the same physical laws. It's an appreciation of the mathematical beauty of nature, of how she works inside; a realization that the phenomena we see result from the complexity of the inner workings between atoms; a feeling of how dramatic and wonderful it is. It's a feeling of awe — of scientific awe — which I felt could be communicated through a drawing to someone who had also had this emotion. It could remind him, for a moment, of this feeling about the glories of the universe.

Kulturphilosophie (1923), Vol. 2 : Civilization and Ethics
Context: Affirmation of the world, which means affirmation of the will-to-live that manifests itself around me, is only possible if I devote myself to other life. From an inner necessity, I exert myself in producing values and practising ethics in the world and on the world even though I do not understand the meaning of the world. For in world- and life-affirmation and in ethics I carry out the will of the universal will-to-live which reveals itself in me. I live my life in God, in the mysterious divine personality which I do not know as such in the world, but only experience as mysterious Will within myself.
Rational thinking which is free from assumptions ends therefore in mysticism. To relate oneself in the spirit of reverence for life to the multiform manifestations of the will-to-live which together constitute the world is ethical mysticism. All profound world-view is mysticism, the essence of which is just this: that out of my unsophisticated and naïve existence in the world there comes, as a result of thought about self and the world, spiritual self-devotion to the mysterious infinite Will which is continuously manifested in the universe.

Thoughts and Glimpses (1916-17)