Man must rise above the Earth - to the top of the atmosphere and beyond - for only thus will he fully understand the world in which he lives.

The misuse of language induces evil in the soul.

Nothing is to be preferred before justice.

...one thing I am ready to fight for as long as I can, in word and act: that is, that we shall be better, braver and more active men if we believe it right to look for what we don't know than if we believe there is no point in looking because what we don't know we can never discover.

All that we know is nothing can be known.

There are a great many of these accusers, and they have been accusing me now for a great many years, and what is more, they approached you at the most impressionable age, when some of you were children or adolescents; and literally won their case by default, because there was no one to defend me.

There is no learning without remembering.