Moderation is the key to lasting enjoyment.
It is impossible for someone to dispel his fears about the most important matters if he doesn't know the nature of the universe but still gives some credence to myths. So without the study of nature there is no enjoyment of pure pleasure.
I think the fear of being seen as childish or crazy severely limits our enjoyment of the world around us, thus inducing a state of boredom that in turn gives rise to much of the stupidity and meanness that oftem seem to epitomize the human condtion. In fact, these ills merely signify that the dues we pay for adult respectability are far too high, and bring some 'benefits' of questionable value.
Thorough selfishness destroys or paralyzes enjoyment. A heart made selfish by the contest for wealth is like a citadel stormed in war, utterly shattered.
If you are going to do something wrong, at least enjoy it.
I am grateful for what I am and have. My thanksgiving is perpetual. It is surprising how contented one can be with nothing definite - only a sense of existence. Well, anything for variety. I am ready to try this for the next ten thousand years, and exhaust it. How sweet to think of! my extremities well charred, and my intellectual part too, so that there is no danger of worm or rot for a long while. My breath is sweet to me. O how I laugh when I think of my vague indefinite riches. No run on my bank can drain it, for my wealth is not possession but enjoyment.
Occupation is the necessary basis of all enjoyment.