I concluded that I might take as a general rule the principle that all things which we very clearly and obviously conceive are true: only observing, ….

Everything is self-evident..

Even the mind depends so much on temperament and the disposition of one's bodily organs that, if it is possible to find a way to make people generall….

I experienced in myself a certain capacity for judging which I have doubtless received from God, like all the other things that I possess; and as He ….

The greatest minds are capable of the greatest vices as well as of the greatest virtues..

In philosophy, when we make use of false principles, we depart the farther from the knowledge of truth and wisdom exactly in proportion to the care w….

Everybody thinks himself so well supplied with common sense that even those most difficult to please. . . never desire more of it than they already h….

For how do we know that the thoughts which occur in dreaming are false rather than those others which we experience when awake, since the former are ….

I did not imitate the skeptics who doubt only for doubting's sake, and pretend to be always undecided; on the contrary, my whole intention was to arr….

The rainbow is such a remarkable phenomenon of nature, and its cause has been so meticulously sought after by inquiring minds throughout the ages, th….

When writing about transcendental issues, be transcendentally clear..

Travelling is almost like talking with those of other centuries..

This result could have been achieved either by his [God] endowing my intellect with a clear and distinct perception of everything about which I would….

The senses deceive from time to time, and it is prudent never to trust wholly those who have deceived us even once..

I should consider that I know nothing about physics if I were able to explain only how things might be, and were unable to demonstrate that they coul….

How do we know that anything really exists, that anything is really the way it seems ot us through our senses?.

These long chains of perfectly simple and easy reasonings by means of which geometers are accustomed to carry out their most difficult demonstrations….

Divide each difficulty at hand into as many pieces as possible and as could be required to better solve them..

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 wh….

Every man is indeed bound to do what he can to promote the good of others, and a man who is of no use to anyone is strictly worthless..

Be that as it may, there is fixed in my mind a certain opinion of long standing, namely that there exists a God who is able to do anything and by who….