Maturity is having the courage to use one's own intelligence!

Freedom is the alone unoriginated birthright of man, and belongs to him by force of his humanity.

I learned to honor human beings, and I would find myself far more useless than the common laborer if I did not believe that this consideration could impart to all others a value establishing the rights of humanity.

The sum total of all possible knowledge of God is not possible for a human being, not even through a true revelation. But it is one of the worthiest inquiries to see how far our reason can go in the knowledge of God.

Thinking in pictures precedes thinking in words.

If I am to constrain you by any law, it must be one by which I am also bound.

Of all the arts poetry (which owes its origin almost entirely to genius and will least be guided by precept or example) maintains the first rank.