Depth of friendship does not depend on length of acquaintance.

Friends and good manners will carry you where money won't go.

There is some self-interest behind every friendship. There is no friendship without self-interests. This is a bitter truth.

Friendship is always a sweet responsibility, never an opportunity.

Success always necessitates a degree of ruthlessness. Given the choice of friendship or success, I'd probably choose success.

A man cannot be said to succeed in this life who does not satisfy one friend.

Friendship at first sight, like love at first sight, is said to be the only truth.

I value the friend who for me finds time on his calendar, but I cherish the friend who for me does not consult his calendar.

A friend may well be reckoned the masterpiece of nature.

Never make friends with people who are above or below you in status. Such friendships will never give you any happiness.