Happiness lies in thinking or doing that which one considers beautiful.
Bowl of Saki, December 31, by Hazrat Inayat Khan
Our appreciation of beauty evolves and changes over our life. So we cannot always depend on our temporary notions of beauty to fulfill us and make us happy.
Man is always seeking for beauty, and yet he is unaware of the treasure of beauty that is hidden in his own heart. He strives after it throughout his whole life. It is as if he was in pursuit of the horizon: the further he proceeds, the further the horizon seems to have moved away. For there are two aims: the one is real, and the other false. That which is false is momentary, transitory, and unreliable - wealth, power, fame, and position are all snatched from one hand by the other. ... Man wants something in life upon which he can rely; and this shows, whether he believes in a deity or not, that he is constantly seeking for God. He seeks for Him not knowing that he is seeking for God. Nevertheless, every soul is pursuing some reality, something to hold on to; trying to grasp something which will prove dependable, a beauty that cannot change and that one can always look upon as one's own, a beauty that one feels will last forever. And where can one find it? Within one's own heart. And it is the art of finding that beauty, of developing, improving, and spreading that beauty through life, allowing it to manifest before the inner and outer view, which one calls the art of the mystic.
from
https://wahiduddin.net/mv2/X/X_4_3.htm