Be sober, and to doubt prepense, These are the sinews of good sense.

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

Read much, but not many works.

Logic is the science of the laws of thought, as thought,--that is of the necessary conditions to which thought considered in itself is a subject.

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

In our natural body every part has a necessary sympathy with every other; and all together form, by their harmonious conspiration, a healthy whole.

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

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

There is a distinction, but no opposition, between theory and practice. Each to a certain extent supposes the other. Theory is dependent on practice; practice must have preceded theory.

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

Consummated science is positively humble.

I've had a lot of worries in my life, most of which never happened.

Sometimes if you want to stand out, you at first have to blend in.

Why had his mother gone to the trouble of bringing him into the world if the most exciting moment in his life was having been made lame by a bayonet?

I often cry, not from sadness, from the joy of the miraculous beauty of life.

You will always define events in a manner which will validate your agreement with reality.

When you knock on the door of opportunity, do not be surprised that it is Work who will answer.

Preach not calmly and quietly as though you were asleep, but preach with fire and pathos and passion.

In business, your positive thoughts and lifestyle choices lead to your personal success and your career success.

Everything has been written. Everybody knows everything about me. There are no secrets. Except the skeletons in my closet.

Good timing is invisible. Bad timing sticks out a mile.