It is often necessary to make a decision on the basis of knowledge sufficient for action but insufficient to satisfy the intellect.

The ultimate destiny of the human race is the greatest moral perfection, provided that it is achieved through human freedom, whereby alone man is capable of the greatest happiness.

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.'

Act in such a way that you will be worthy of being happy.

But a lie is a lie, and in itself intrinsically evil, whether it be told with good or bad intents.

Criticism alone can sever the root of materialism, fatalism, atheism, free-thinking, fanaticism, and superstition, which can be injurious universally; as well as of idealism and skepticism, which are dangerous chiefly to the Schools, and hardly allow of being handed on to the public.

Two things awe me most, the starry sky above me and the moral law within me.