Emerson

Ah, how good it feels! the hand of an old friend.

Longfellow

He who has a thousand friends has not a friend to spare,
But he who has one enemy will meet him everywhere.

Oriental Proverb

Nor scour the seas, nor sift mankind,
A poet or a friend to find;
Behold, he watches at the door,
Behold his shadow on the floor.

Emerson

A friend who will not despise us for our weakness, nor disown us for our sinfulness, nor tire of us for being troublesome, nor scoff at us for our sensibility, but who will patiently hear our tale, fully understand our regret, tenderly recognise our stumbling-blocks, and be honest enough to tell us the truth, cost us what it may—oh, do you not see what a real help he might be to us.

Bishop Thorold