Friends show their love in times of trouble, not in happiness. – Euripides

There is something in the unselfish and self-sacrificing love of a brute, which goes directly to the heart of him who has had frequent occasion to test the paltry friendship and gossamer fidelity of mere Man. – Edgar Allan Poe

Friendship, like the immortality of the soul, is too good to be believed. – Ralph Waldo Emerson