I am wiser than this man, for neither of us appears to know anything great and good; but he fancies he knows something, although he knows nothing; whereas I, as I do not know anything, so I do not fancy I do. In this trifling particular, then, I appear to be wiser than he, because I do not fancy I know what I do not know.

Wisdom is knowing what you don't know.

The man who is truly wise knows that he knows very little.

A man should inure himself to voluntary labor, and not give up to indulgence and pleasure, as they beget no good constitution of body nor knowledge of mind.

Since I am convinced that I wrong no one, I am not likely to wrong myself.

I shall never fear or avoid things of which I do not know.

It is better to be at odds with the whole world than, being one, to be at odds with myself.