Since we cannot know all that there is to be known about anything, we ought to know a little about everything. - Blaise Pascal

If you put the world's greatest philosopher on a plank wider than he needs, but with a precipice beneath, however strongly his reason may convince him of his safety, his imagination will prevail.

One must know oneself. Even if that does not help in finding truth, at least it helps in running one's life, and nothing is more proper.

The will is one of the chief organs of belief, not because it creates belief, but because things are true or false according to the aspect by which we judge them. When the will likes one aspect more than another, it deflects the mind from considering the qualities of the one it does not care to see. Thus the mind, keeping in step with the will, remains looking at the aspect preferred by the will and so judges by what it sees there.