Beware
Of entrance to a quarrel; but being in,
Bear’t that th’ opposed may beware of thee.
Give every man thine ear, but few thy voice;
Take each man’s censure, but reserve thy judgment.
Costly thy habit as thy purse can buy,
But not express’d in fancy; rich, not gaudy;
For the apparel oft proclaims the man.
…
Neither a borrower nor a lender be;
For loan oft loses both itself and friend
And borrowing dulls the edge of husbandry.
This above all- to thine own self be true,
And it must follow, as the night the day,
Thou canst not then be false to any man.
~ William Shakespeare