Some years ago I was struck by the large number of falsehoods that I had accepted as true in my childhood, and by the highly doubtful nature of the whole edifice that I had subsequently based on them. I realized that it was necessary, once in the course of my life, to demolish everything completely and start again right from the foundations if I wanted to establish anything at all in the sciences that was stable and likely to last.

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

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

De omnibus dubitandum

All is to be doubted.

He who hid well, lived well.

There is nothing so far removed from us as to be beyond our reach, or so hidden that we cannot discover it.