The jealous are troublesome to others, but a torment to themselves.
Jealousy is a kind of civil war in the soul, where judgment and imagination are at perpetual jars.
Nothing stands safe in its way; nature, interest, religion, must yield to its fury. It violates contracts, dissolves society, breaks wedlock, betrays friends and neighbors; no body is good, and every one is either doing or designing them a mischief.
It has a venom that more of less rankles whoever it bites; and as it reports fancies for facts, so it disturbs its own house, as often as other' folks.
Its rise is guilt or ill-nature; and by reflection it thinks its own faults to be other mens; as he that is over run with the jaundice takes others to be yellow.
A jealous man only sees his own spectrum when he looks upon other men, and gives his character in theirs."
William Penn --