Never underestimate the power of jealousy and the power of envy to destroy. Never underestimate that.

To jealousy nothing is more frightful than laughter.

Jealousy contains more of self-love than of love.

People are taken aback by a confident pretty girl who knows what she wants in life and isn't going to let anyone get in her way. And you know what it's all about? Jealousy.

Guard with jealous attention the public liberty. Suspect everyone who approaches that jewel. Unfortunately nothing will preserve it but downright force. Whenever you give up that force you are inevitably ruined.

Don't waste time on jealousy. Sometimes you're ahead sometimes you're behind.

The jealous are troublesome to others but a torment to themselves.

A negative judgment gives you more satisfaction than praise provided it smacks of jealousy.

It will be found an unjust and unwise jealousy to deprive a man of his natural liberty upon the supposition he may abuse it.

I think it's important to get your surroundings as well as yourself into a positive state - meaning surround yourself with positive people not the kind who are negative and jealous of everything you do.