An instinct is an agent which performs blindly and ignorantly a work of intelligence and knowledge.

There are two sorts of ignorance: we philosophize to escape ignorance we start from the one, we repose in the other they are the goals from which and to which we tend and the pursuit of knowledge is but a course between two ignorances, as human life is only a traveling from grave to grave.

Metaphysics, in whatever latitude the term be taken, is a science, or complement of sciences, exclusively occupied with mind.

The pursuit of knowledge is but a course between two ignorances, as human life is itself only a wayfaring from grave to grave.

Truth like a torch, the more 'tis shock, it shines.

A judgment is the mental act by which one thing is affirmed or denied of another.

Read much, but not many works.