Intelligence is the only moral guide.

It is hard to overstate the debt we owe to the men and women of genius.

The rights of men and women should be equal and sacred-marriage should be a perfect partnership.

Commerce makes friends, religion makes enemies; the one enriches, and the other impoverishes; the one thrives best where the truth is told, the other where falsehoods are believed.

One thing I do know, and that is, that neither hope, nor fear, belief, nor denial, can change the fact. It is as it is, and it will be as it must be.

Superstition is, always has been, and forever will be, the foe of progress, the enemy of education and the assassin of freedom.

I would rather smoke one cigar than hear two sermons.