The errors of young men are the ruin of business, but the errors of aged men amount to this, that more might have been done, or sooner.

Truth can never be reached by just listening to the voice of an authority.

Young people are fitter to invent than to judge; fitter for execution than for counsel; and more fit for new projects than for settled business.

Silence is the virtue of fools.

The logic now in use serves rather to fix and give stability to the errors which have their foundation in commonly received notions than to help the search for truth. So it does more harm than good.

Much bending breaks the bow; much unbending the mind.

A man cannot speak to his son, but as a father; to his wife, but as a husband; to his enemy, but upon terms: whereas a friend may speak, as the case requires, and not as it sorteth with the person.