Reason should investigate its own parameters before declaring its omniscience.
[A ruler is merely] the trustee of the rights of other men and he must always stand in dread of having in some way violated these rights.
Every human being should always be treated as an end and never as a mere instrument.
Life is the faculty of spontaneous activity, the awareness that we have powers.
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.
Duty is the necessity to act out of reverence for the law.