For affection, or the faintest imitation of it, a man should be obliged to his very dog. But for the gross assistance of patronage or purse, let him pause before accepting them from anyone.
--Carlyle
Thine own friend, and thy father’s friend, forsake not.
--The Book of Proverbs
The only good friends are old friends.
--Voltaire
Whosoever formeth an intimacy with the enemies of his friends, does so to injure the latter. O wise man! wash your hands of that friend who associates with your enemies.
--Saadi
To thrust aside a virtuous friend, I consider as bad as to thrust away one’s own life, which one loves best.
--Sophocles
Friendship is one soul in two bodies.
--Pythagoras
He removes the greatest ornament of friendship who takes away from it respect.
--Cicero
Friendship is no respecter of sex; and perhaps it is more rare between the sexes, than between two of the same sex.
--Henry D. Thoreau
The loss of a friend is like that of a limb; time may heal the anguish of the wound, but the loss cannot be repaired.
--Southey
As in the fire the yellow gold is tried, So friendship’s faith can but be proved in time Of dark adversity.
--Ovid
I always avoid contention, but if it shall happen, I had rather lose my money than my friend.
--Erasmus
There are three faithful friends--an old wife, an old dog and ready money.
--Franklin
No discovery of defect in a character essentially good can so dampen friendship as the suspicion that something is kept back.
--Channing
Thou learnest no secret until thou knowest friendship, since to the unsound no heavenly knowledge enters.
--Hafiz
The Book of Friendship: a Little Manual of Comradeship · The Wunder Library — complete classics, free to read, with narration.