doubt quotes from influential philosophers, authors and people
"Doubt is the origin of wisdom."
910
"For I found myself embarrassed with so many doubts and errors that it seemed to me that the effort to instruct myself had no effect other than the increasing discovery of my own ignorance."
924
"At last I will devote myself sincerely and without reservation to the general demolition of my opinions."
927
"Some years ago I was struck by the large number of falsehoods that I had accepted as true in my childhood, and by the highly doubtful nature of the whole edifice that I had subsequently based on them. I realized that it was necessary, once in the course of my life, to demolish everything completely and start again right from the foundations if I wanted to establish anything at all in the sciences that was stable and likely to last."
932
"I doubt, therefore I think, therefore I am."
936
"What if everything in the world were a misunderstanding, what if laughter were really tears?"
1070
"Religion is a culture of faith; science is a culture of doubt."
1194
"There is no doubt that life is given us, not to be enjoyed, but to be overcome; to be got over."
78
"Understand: people will constantly attack you in life. One of their main weapons will be to instill in you doubts about yourself – your worth, your abilities, your potential. They will often disguise this as their objective opinion, but invariably it has a political purpose – they want to keep you down."
155
"An amateur lets the negative opinion of others unman him. He takes external criticism to heart, allowing it to trump his own belief in himself and his work."
329
"Doubt is an uncomfortable condition, but certainty is a ridiculous one."
733
"Do the impossible and you’ll never doubt yourself ever again."
812
"If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things."
907
"But what then am I? A thing that thinks. What is that? A thing that doubts, understand, affirms, denies, wills, refuses, and that also imagines and senses."
938
"Each generation doubtless feels called upon to reform the world. Mine knows that it will not reform it, but its task is perhaps even greater. It consists in preventing the world from destroying itself."
1050
"How prone to doubt, how cautious are the wise!"
1093