Men do not know the natural infirmity of their mind: it does nothing but ferret and quest, and keeps incessantly whirling around, building up and becoming entangled in its own work, like silkworms, and is suffocated in it. A mouse in a pitch barrel...thinks it notices from a distance some sort of glimmer of imaginary light and truth; but while running toward it, it is crossed by so many difficulties and obstacles, and diverted by so many new quests, that it strays from the road, bewildered.

The greatest thing in the world is to know how to belong to oneself.

I have often seen people uncivil by too much civility, and tiresome in their courtesy.

If not for that of conscience, yet at least for ambition's sake, let us reject ambition, let us disdain that thirst of honor and renown, so low and mendicant; that it makes us beg it of all sorts of people.

The share we have in the knowledge of truth, such as it is, has not been acquired by our own powers. God has taught ushis wonderful secrets; our faith is not of our acquiring, it is purely the gift of another's bounty.

How many valiant men we have seen to survive their own reputation!

I study myself more than any other subject. That is my metaphysics, that is my physics.