"Supreme happiness will be the greatest cause..." - Quote by Leonardo Da Vinci

“A deaf and dumb person who sees two men in conversation - may nevertheless understand from the attitudes and gestures of the speakers, how well their discussion is getting along.”

“The acquisition of knowledge is always of use to the intellect, because it may thus drive out useless things and retain the good. For nothing can be loved or hated unless it is first known.”

“Nature alone is the master of true genius.”

“A particularly beautiful woman is a source of terror. As a rule, a beautiful woman is a terrible disappointment.”

“It is always with the best intentions that the worst work is done.”

“I see black light (his last words)”

“If you can't learn to enjoy your life when you have problems, you may never enjoy it because we'll always have problems.”

“Happiness is just how you feel when you don't feel miserable.”

“Most people are as happy as they want to be.”