We can always get along better by reason and love of truth than by worry of conscience and remorse...we should strive to keep worry from our life.

Nothing comes to pass in nature, which can be set down to a flaw therein; for nature is always the same, and everywhere one and the same in her efficacy and power of action: that is, nature's laws and ordinances, whereby all things come to pass and change from one form to another, are everywhere and always the same; so that there should be one and the same method of understanding the nature of all things whatsoever, namely, through nature's universal laws and rules.

The more we understand individual things, the more we understand God.

Men are mistaken in thinking themselves free; their opinion is made up of consciousness of their own actions, and ignorance of the causes by which they are determined.

Blessedness is not the reward of virtue but virtue itself.

Men will find that they can ... avoid far more easily the perils which beset them on all sides by united action.

If you want the present to be different from the past, study the past.