“To philosophize is to doubt”
Michel de Montaigne
“The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts.”
Bertrand Russell
“Dubito ergo cogito; cogito ergo sum.(I doubt, therefore I think; I think therefore I am)”
Rene Descartes
“The philosopher believes that the value of his philosophy lies in the whole, in the building: posterity discovers it in the bricks with which he built and which are then often used again for better building: in the fact, that is to say, that building can be destroyed and nonetheless possess value as material.”
Friedrich Nietzsche
“Philosophy, when superficially studied, excites doubt; when thoroughly explored, it dispels it”
Francis Bacon Sr.
“And new Philosophy calls all in doubt, the element of fire is quite put out; the Sun is lost, and the earth, and no mans wit can well direct him where to look for it.”
John Donne
“Philosophy goes no further than probabilities, and in every assertion keeps a doubt in reserve.”
James A. Froude