What we obtain too cheap, we esteem too lightly; it is dearness only that gives everything its value.
When men yield up the privilege of thinking, the last shadow of liberty quits the horizon.
Every religion is good that teaches man to be good; and I know of none that instructs him to be bad.
A long habit of not thinking a thing wrong gives it a superficial appearance of being right.
A thing moderately good is not so good as it ought to be. Moderation in temper is always a virtue; but moderation in principle is always a vice.
All national institutions of churches, whether Jewish, Christian or Turkish, appear to me no other than human inventions, set up to terrify and enslave mankind, and monopolize power and profit.
An army of principles can penetrate where an army of soldiers cannot.
Any system of religion that has anything in it that shocks the mind of a child, cannot be true.
Arms discourage and keep the invader and plunderer in awe, and preserve order in the world as well as property... Horrid mischief would ensue were the law-abiding deprived of the use of them.
Belief in a cruel God makes a cruel man.
Character is much easier kept than recovered.
Every science has for its basis a system of principles as fixed and unalterable as those by which the universe is regulated and governed. Man cannot make principles; he can only discover them.
He that rebels against reason is a real rebel, but he that in defence of reason rebels against tyranny has a better title to Defender of the Faith, than George the Third.
He that would make his own liberty secure, must guard even his enemy from oppression; for if he violates this duty, he establishes a precedent that will reach to himself.
He who is the author of a war lets loose the whole contagion of hell and opens a vein that bleeds a nation to death.