“We must always change, renew, rejuvenate ourselves; otherwise, we harden.”

“We are never deceived; we deceive ourselves. ”

“Is it not enough that we cannot make one another happy, must we also rob one another of the pleasures that any heart may permit itself now and then? And name me a person who in a bad mood will be decent enough to hide it, to bear it alone, without destroying the joy around him. Is it not rather an inner dissatisfaction with our own unworthiness, a dislike of ourselves that is always associated with envy aggravated by foolish conceit? We see people happy and not made happy by us, and that is unbearable.”

“We are our own devils; we drive ourselves out of our Edens.”

“Knowing is not enough; we must apply. Willing is not enough; we must do.”

“Did we force ourselves on you, or you on us?”

“For we are so constituted by nature, that we are ever prone to compare ourselves with others; and our happiness or misery depends very much on the objects and persons around us. On this account, nothing is more dangerous than solitude: there our imagination, always disposed to rise, taking a new flight on the wings of fancy, pictures to us a chain of beings of whom we seem the most inferior.”