Those who intend on becoming great should love neither themselves or their own things, but only what is just, whether it happens to be done by themselves or others.

As it is, the lover of inquiry must follow his beloved wherever it may lead him.

Is it not true that the clever rogue is like the runner who runs well for the first half of the course, but flags before reaching the goal: he is quick off the mark, but ends in disgrace and slinks away crestfallen and uncrowned. The crown is the prize of the really good runner who perseveres to the end.

He who love touches walks not in darkness.

Man is a biped without feathers.

But that we shall be better and braver and less helpless if we think that we ought to enquire, than we should have been if we indulged in the idle fancy that there was no knowing and no use in seeking to know what we do not know; - that is a theme upon which I am ready to fight, in word and deed, to the utmost of my power.

There is a ... matter - much more valuable and divine than natural philosophy . ... On this matter I must speak to you in enigmas.