Ideals are an imaginative understanding of that which is desirable in that which is possible.

We forge gradually our greatest instrument for understanding the world - introspection. We discover that humanity may resemble us very considerably - that the best way of knowing the inwardness of our neighbors is to know ourselves.

I've always argued that it is just as desirable, just as possible, to have philosopher plumbers as philosopher kings.

It is impossible to abolish either with a law or an ax the desires of men

The study of error is not only in the highest degree prophylactic, but it serves as a stimulating introduction to the study of truth.

There can be no liberty for a community which lacks the means by which to detect lies.