Who hath a prospect of the different state of perfect happiness or misery that attends all men after this life, depending on their behavior, the measures of good and evil that govern his choice are mightily changed.

A sound mind in a sound body is a short but full description of a happy state in this world.

Whoever uses force without Right ... puts himself into a state of War with those, against whom he uses it, and in that state all former Ties are canceled, all other Rights cease, and every one has a Right to defend himself, and to resist the Aggressor.

Error is none the better for being common, nor truth the worse for having lain neglected.

He that would seriously set upon the search of truth, ought in the first place to prepare his mind with a love of it. For he that loves it not, will not take much pains to get it; nor be much concerned when he misses it.

For it will be very difficult to persuade men of sense that he who with dry eyes and satisfaction of mind can deliver his brother to the executioner to be burnt alive, does sincerely and heartily concern himself to save that brother from the flames of hell in the world to come.

Mathematical proofs, like diamonds, are hard and clear, and will be touched with nothing but strict reasoning.