Give to every other human being every right that you claim for yourself - that is my doctrine
The American constitutions were to liberty, what a grammar is to language they define its parts of speech, and practically construct them into syntax
It is necessary to the happiness of man that he be mentally faithful to himself. Infidelity does not consist in believing or in disbelieving it consists in professing to believe what he does not believe.
The final event to himself has been, that as he rose like a rocket, he fell like the stick.
What we obtain too cheap, we esteem too lightly it is dearness only that gives everything its value.
It is an affront to treat falsehood with complaisance.
The strength and power of despotism consists wholly in the fear of resistance.
Any system of religion that has anything in it that shocks the mind of a child, cannot be true.
It is necessary to the happiness of man that he be mentally faithful to himself. Infidelity does not consist in believing, or in disbelieving, it consists in professing to believe what he does not believe.
To establish any mode to abolish war, however advantageous it might be to Nations, would be to take from such Government the most lucrative of its branches.
One good schoolmaster is of more use than a hundred priests.
Every religion is good that teaches man to be good and I know of none that instructs him to be bad.
Reason obeys itself and ignorance submits to whatever is dictated to it.
The most formidable weapon against errors of every kind is reason.
What we obtain too cheap, we esteem to lightly.
If we do not hang together, we shall surely hang separately.
A bad cause will never be supported by bad means and bad men.
Time makes more converts than reason.
Titles are but nicknames, and every nickname is a title.
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.
The Vatican is a dagger in the heart of Italy.
...it is easy to see that when the republican virtue fails, slavery ensues.
When we are planning for posterity, we ought to remember that virtue is not hereditary
Society is produced by our wants and government by our wickedness
War involves in its progress such a train of unforeseen circumstances that no human wisdom can calculate the end it has but one thing certain, and that is to increase taxes.