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

Whatever I have up till now accepted as most true and assured I have gotten either from the senses or through the senses. But from time to time I have found that the senses deceive, and it is prudent never to trust completely those who have deceived us even once.

Nothing comes out of nothing.

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

Common sense is the most widely shared commodity in the world, for every man is convinced that he is well supplied with it.

The principal effect of the passions is that they incite and persuade the mind to will the events for which they prepared the body.

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, however, that there is some difficulty in rightly determining the objects which we distinctly conceive.