The greatest minds are capable of the greatest vices as well as of the greatest virtues.
So blind is the curiosity by which mortals are possessed, that they often conduct their minds along unexplored routes, having no reason to hope for success, but merely being willing to risk the experiment of finding whether the truth they seek lies there.
When I turn my mind's eye upon myself, I understand that I am a thing which is incomplete and dependent on another and which aspires without limit to ever greater and better things...
Nothing can be imagined which is too strange or incredible to have been said by some philosopher.
All that is necessary to right action is right judgment, and to the best action the most correct judgment.
I am like a prisoner who happens on enjoy an imaginary freedom in his dreams and who subsequently begins to suspect that he is asleep and, afraid of being awakened, conspires silently with his agreeable illusions.
Travelling is almost like talking with those of other centuries.
For the very fact that my knowledge is increasing little by little is the most certain argument for its imperfection.
It is best not to go on for great quest for truth , it will only make you miserable.
It is a mark of prudence never to place our complete trust in those who have deceived us even once.
There is nothing more ancient than the truth.
Good sense is, of all things among men, the most equally distributed; for every one thinks himself so abundantly provided with it, that those even who are the most difficult to satisfy in everything else, do not usually desire a larger measure of this quality than they already possess.