Long customs are not easily ...

Long customs are not easily broken; he that attempts to change the course of his own life very often labors in vain; and how shall we do that for others, which we are seldom able to do for ourselves.
Long customs are not easily broken; he that attempts to change the course of his own life very often labors in vain; and how shall we do that for others, which we are seldom able to do for ourselves.

Quotes from the same author

If a man does not make new acquaintances as he advances through life, he will soon find himself left alone. A man, sir, should keep his friendship in a constant repair.
To keep your secret is wisdom; but to expect others to keep it is folly.
Love is the wisdom of the fool and the folly of the wise.
Memory is the mother of all wisdom.
Friendship, like love, is destroyed by long absence, though it may be increased by short intermissions.