It is beyond a doubt that all our knowledge begins with experience. – Kant

He who is cruel to animals becomes hard also in his dealings with men. We can judge the heart of a man by his treatment of animals. – Kant

To be is to do. – Kant

Thoughts without content are empty, intuitions without concepts are blind. – Kant

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.’ – Kant

Happiness is not an ideal of reason, but of imagination. – Kant

When liberty is mentioned, we must always be careful to observe whether it is not really the assertion of private interests which is thereby designated. – Hegel

Mere goodness can achieve little against the power of nature. – Hegel

We do not need to be shoemakers to know if our shoes fit, and just as little have we any need to be professionals to acquire knowledge of matters of universal interest. – Hegel

Mark this well, you proud men of action! you are, after all, nothing but unconscious instruments of the men of thought. – Hegel