Never injure a friend, even in jest. –Cicero
The best part of one’s life consists of his friendships. –Abraham Lincoln
Be true to your word, your work, and your friend.
Henry David Thoreau
It is chance that makes brothers but hearts that make friends.
Von Geibel
True friendship between two people is infinite and immortal. –Plato
But if the while I think on thee, dear friend, all losses are restored and sorrows end. –William Shakespeare
I have learned that to be with those I like is enough. –Walt Whitman
Be slow in choosing a friend, slower in changing. –Benjamin Franklin