The easy, gentle, and sloping path . . . is not the path of true virtue. It demands a rough and thorny road.

No man is exempt from saying silly things; the mischief is to say them deliberately.

Even opinion is of force enough to make itself to be espoused at the expense of life.

Learning is a good medicine: but no medicine is powerful enough to preserve itself from taint and corruption independently of defects in the jar that it is kept in. One man sees clearly but does not see straight: consequently he sees what is good but fails to follow it; he sees knowledge and does not use it.

My business is only to keep myself in motion, whilst motion pleases me; I only walk for the walk's sake.

I consider myself an average man, except in the fact that I consider myself an average man.

A man must always study, but he must not always go to school: what a contemptible thing is an old abecedarian!