It is only when we forget all our learning that we begin to know.

We hear and apprehend only what we already half know.

It is only when we forget out learning that we begin to know.

To know that we know what we know, and that we do not know what we do not know, that is true knowledge.

I never found a companion that was so companionable as solitude.

I do believe in simplicity. It is astonishing as well as sad, how many trivial affairs even the wisest thinks he must attend to in a day; how singular an affair he thinks he must omit. When the mathematician would solve a difficult problem, he first frees the equation of all incumbrances, and reduces it to its simplest terms. So simplify the problem of life, distinguish the necessary and the real. Probe the earth to see where your main roots run.