Nay, number itself in armies importeth not much, where the people is of weak courage; for, as Virgil saith, It never troubles the wolf how many the sheep be.

Liberty of speech invites and provokes liberty to be used again, and so bringeth much to a man's knowledge.

Since my logic aims to teach and instruct the understanding, not that it may with the slender tendrils of the mind snatch at and lay hold of abstract notions (as the common logic does), but that it may in very truth dissect nature, and discover the virtues and actions of bodies, with their laws as determined in matter; so that this science flows not merely from the nature of the mind, but also from the nature of things.

One always starts work with the subject, no matter how tenuous it is, and one constructs an artificial structure by which one can trap the reality of the subject-matter that one has started from.

Vices of the time; vices of the man.

The general root of superstition is that men observe when things hit, and not when they miss, and commit to memory the one, and pass over the other.

Time is the author of authors.