"The mind once enlightened cannot again become dark."

"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."

"The most formidable weapon against errors of every kind is reason."

"The more perfect civilization is, the less occasion has it for government, because the more does it regulate its own affairs, and govern itself."

"Character is much easier kept than recovered."