"We must doubt the certainty of everything..." - Quote by Leonardo Da Vinci
We must doubt the certainty of everything which passes through the senses, but how much more ought we to doubt things contrary to the senses, such as the existence of God and the soul.
More by Leonardo Da Vinci
“While I thought that I was learning how to live, I have been learning how to die.”
“One has no right to love or hate anything if one has not acquired a thorough knowledge of its nature. Great love springs from great knowledge of the beloved object, and if you know it but little you will be able to love it only a little or not at all.”
“The senses are of the earth, the reason stands apart from them in contemplation.”
More on Doubt
“Doubt means don't. Don't move. Don't answer. Don't rush forward.”
“If one hesitates in his path, let him not proceed. Let him respect his doubts, for doubts, too, may have some divinity in them.”
“No one talks more passionately about his rights than he who in the depths of his soul doubts whether he has any. By enlisting passion on his side he wants to stifle his reason and its doubts: thus he will acquire a good conscience and with it success among his fellow men.”