What was once thought can never be unthought.

What was once thought can never be unthought.

A hundred wagon loads of thoughts will not pay a single ounce of debt.

A hundred wagon loads of thoughts will not pay a single ounce of debt.

Beware when the great God lets loose a thinker on this planet.

Beware when the great God lets loose a thinker on this planet.

Those who cannot understand how to put their thoughts on ice should not enter into the heat of debate.

Those who cannot understand how to put their thoughts on ice should not enter into the heat of debate.

It's only a thought, and a thought can be changed.

It's only a thought, and a thought can be changed.

In matters of conscience, first thoughts are best. In matters of prudence, last thoughts are best.

In matters of conscience, first thoughts are best. In matters of prudence, last thoughts are best.

Thoughts are the shadows of our sensations -- always darker, emptier, simpler than these.

Thoughts are the shadows of our sensations -- always darker, emptier, simpler than these.

If I have done the public any service, it is due to my patient thought.

If I have done the public any service, it is due to my patient thought.

Thought is the wind, knowledge the sail, and mankind the vessel.

Thought is the wind, knowledge the sail, and mankind the vessel.