“To live without philosophizing is in truth the same as keeping the eyes closed without attempting to open them.”

“At last I will devote myself sincerely and without reservation to the general demolition of my opinions.”

“The first precept was never to accept a thing as true until I knew it as such without a single doubt.”

“[...] the diversity of our opinions, consequently, does not arise from some being endowed with a larger share of reason than others, but solely from this, that we conduct our thoughts along different ways, and do not fix our attention on the same objects. For to be possessed of a vigorous mind is not enough; the prime requisite is rightly to apply it. The greatest minds, as they are capable of the highest excellences, are open likewise to the greatest aberrations; and those who travel very slowly may yet make far greater progress, provided they keep always to the straight road, than those who, while they run, forsake it.”

“I had become aware, as early as my college days, that no opinion, however absurd and incredible can be imagined, that has not been held by one of the philosophers.”

“There is nothing more ancient than the truth.”

“It is best not to go on for great quest for truth , it will only make you miserable”