[R]eason is... given to us as a practical faculty, that is, as one that influences the will.
Reason should investigate its own parameters before declaring its omniscience.
An action, to have moral worth, must be done from duty.
Procrastination is hardly more evil than grasping impatience.
All the interests of my reason, speculative as well as practical, combine in the three following questions: 1. What can I know? 2. What ought I to do? 3. What may I hope?
So act that anything you do may become universal law.