This notion [skepticism] is more clearly understood by asking "What do I know?"

Wisdom has its excesses, and has no less need of moderation than folly.

He who does not live in some degree for others, hardly lives for himself.

Make your educational laws strict and your criminal ones can be gentle; but if you leave youth its liberty you will have to dig dungeons for ages.

Judgement can do without knowledge: but not knowledge without judgement.

Teach him a certain refinement in sorting out and selecting his arguments, with an affection for relevance and so for brevity. Above all let him be taught to throw down his arms and surrender to truth as soon as he perceives it, whether the truth is born at his rival's doing or within himself from some change in his ideas.

We are nothing but ceremony; ceremony carries us away, and we leave the substance of things; we hang on to the branches and abandon the trunk and body.