The greatest minds, as they are capable of the highest excellencies, are open likewise to the greatest aberrations; and those who travel very slowly may yet make far greater progress, provided they keep always to the straight road, than those who, while they run, forsake it.

He who hid well, lived well.

Variant: When it is not in our power to follow what is true, we ought to follow what is most probable.

I am accustomed to sleep and in my dreams to imagine the same things that lunatics imagine when awake.

For to be possessed of a vigorous mind is not enough; the prime requisite is rightly to apply it.

I have concluded the evident existence of God, and that my existence depends entirely on God in all the moments of my life, that I do not think that the human spirit may know anything with greater evidence and certitude.

The only secure knowledge is that I exist.