A categorical imperative would be one which represented an action as objectively necessary in itself, without reference to any other purpose.

Man must be disciplined, for he is by nature raw and wild.

What can I know? What ought I to do? What may I hope?

Patience is the strength of the weak, impatience is the weakness of the strong.

In law a man is guilty when he violates the rights of others. In ethics he is guilty if he only thinks of doing so.

Beneficence is a duty; and he who frequently practices it, and sees his benevolent intentions realized comes, at length, really to love him to whom he has done good.

The science of mathematics presents the most brilliant example of how pure reason may successfully enlarge its domain without the aid of experience