Always recognize that human individuals are ends, and do not use them as means to your end..

All our knowledge begins with the senses....

The light dove, cleaving the air in her free flight, and feeling its resistance, might imagine that its flight would be still easier in empty space..

If a man is often the subject of conversation he soon becomes the subject of criticism..

Honesty is better than any policy..

The greatest human quest is to know what one must do in order to become a human being..

Humanity is at its greatest perfection in the race of the whites..

Both love of mankind, and respect for their rights are duties; the former however is only a conditional, the latter an unconditional, purely imperati….

Physicians think they do a lot for a patient when they give his disease a name..

Prudence approaches, conscience accuses..

It is by his activities and not by enjoyment that man feels he is alive. In idleness we not only feel that life is fleeting, but we also feel lifeles….

After death the soul possesses self-consciousness, otherwise, it would be the subject of spiritual death, which has already been disproved. With this….

Sincerity is the indispensable ground of all conscientiousness, and by consequence of all heartfelt religion..

The bad thing of war is, that it makes more evil people than it can take away..

Standing armies shall in time be totally abolished..

There is no virtue in penance and fasting which waste the body; they are only fanatical and monkish..

Even philosophers will praise war as ennobling mankind, forgetting the Greek who said: 'War is bad in that it begets more evil than it kills.'.

The enjoyment of power inevitably corrupts the judgment of reason, and perverts its liberty..

Act so that the maxim of your act could be made the principle of a universal law..

Duty is the necessity to act out of reverence for the law..

Perpetual Peace is only found in the graveyard..