A man has no enemy worse than himself.

In a discussion of this kind our interest should be centered not on the weight of the authority but on the weight of the argument. Indeed the authority of those who set out to teach is often an impediment to those who wish to learn. They cease to use their own judgment and regard as gospel whatever is put forward by their chosen teacher.

To freemen, threats are impotent.

We are all excited by the love of praise, and the noblest are most influenced by glory.

Let flattery, the handmaid of the vices, be far removed .

Though laughter is allowable, a horse-laugh is abominable.

No man should so act as to make a gain out of the ignorance of another.