"Jealousy lives upon doubts. It becomes madness..." - Quote by Francois De La Rochefoucauld

“As the great ones of this world are unable to bestow health of body or peace of mind, we always pay too high a price for any good they can do.”

“It is much easier to seem fitted for posts we do not fill than for those we do.”

“No persons are more frequently wrong, than those who will not admit they are wrong.”

“Negative states of mind, such as anger, resentment, fear, envy, and jealousy, are products of the ego.”

“jealousy is conceived only in insecurity and must be nourished in fear.”

“Jealousy contains more of self-love than of love.”

“We know accurately only when we know little, with knowledge doubt increases.”

“This is what I see, and what troubles me. I look on all sides, and everywhere I see nothing but obscurity. Nature offers me nothing that is not a matter of doubt and disquiet.”

“Whenever people agree with me I always feel I must be wrong.”