It is not indeed certain, ...

It is not indeed certain, that the most refined caution will find a proper time for bringing a man to the knowledge of his own failing, or the most zealous benevolence reconcile him to that judgment by which they are detected; but he who endeavours only the happiness of him whom he reproves will always have either the satisfaction of obtaining or deserving kindness; if he succeeds, he benefits his friend; and if he fails, he has at least the consciousness that he suffers for only doing well.
It is not indeed certain, that the most refined caution will find a proper time for bringing a man to the knowledge of his own failing, or the most zealous benevolence reconcile him to that judgment by which they are detected; but he who endeavours only the happiness of him whom he reproves will always have either the satisfaction of obtaining or deserving kindness; if he succeeds, he benefits his friend; and if he fails, he has at least the consciousness that he suffers for only doing well.

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.