Friendship will not stand the strain of very much good advice for very long. – Robert Staughton Lynd

Perfect friendship is the friendship of men who are good, and alike in excellence for these wish well alike to each other qua good, and they are good in themselves. – Aristotle

It is a good thing to be rich, and it is a good thing to be strong, but it is a better thing to be loved of many friends. – Euripides

Friendship, of itself a holy tie, is made more sacred by adversity. – Charles Caleb Colton