Good and evil, reward and punishment, are the only motives to a rational creature

Reason must be our last judge and guide in everything.

As it is in the body, so it is in the mind; practice makes it what it is, and most even of those excellencies, what are looked on as natural endowments, will be found, when examined into more narrowly, to be the product of exercise, and to be raised to that pitch, only by repeated actions.

It is one thing to persuade, another to command; one thing to press with arguments, another with penalties.

Logic is the anatomy of thought.

Men in great place are thrice servants; servants of the sovereign state, servants of fame, and servants of business; so as they have no freedom, neither in their persons, nor in their actions, nor in their times. It is a strange desire to seek power and to lose liberty; or to seek power over others, and to lose power over a man's self.

Children should from the beginning be bred up in an abhorrence of killing or tormenting any living creature; and be taught not to spoil or destroy any thing, unless it be for the preservation or advantage of some other that is nobler.