The reason adultery is immoral is that it might lead to marriage.

The greater the obstacle the more glory in overcoming it. - What does not destroy makes me stronger.

Why does man not see things? He is himself standing in the way: he conceals things.

To regard states of distress in general as an objection, as something which must be abolished is the greatest nonsense on earth; having the most disastrous consequences, fatally stupid- almost as stupid as a wish to abolish bad weather - out of pity for the poor.

Every one being allowed to learn to read, ruineth in the long run not only writing but also thinking.

We no longer love our knowledge enough once we have passed it on.

We must be physicists in order to be creative since so far codes of values and ideals have been constructed in ignorance of physics or even in contradiction to physics.