It is humankind's duty to respect all life, not only animals have feelings but even also trees and plants.
When a man points a finger at someone else, he should remember that three of his fingers are pointing at himself. Do not worry about your difficulties in mathematics; I can assure you that mine are still greater.
The stupid are invincible.
I'd rather be an optimist and a fool than a pessimist and right.
We have to do the best we are capable of. This is our sacred human responsibility.
If I had known they were going to do this, I would have become a shoemaker.