Delta quotations

It just occurred to me that these quotations I particularly like are pretty delta, especially when taken together:


"If you take a flower in your hand and really look at it, it's your world for a moment."
- Georgia O'Keeffe

"Deprived of meaningful work, men and women lose their reason for existence; they go stark, raving mad."
- Fyodor Dostoevsky

"In theory there is no difference between theory and practice. In practice, there is."
- unknown


So now I'm curious: what are some of the quotations other deltas like most?