My business in life has been to think and learn, and to speak out with absolute freedom what I have thought and learned. The freedom is itself a positive and never-failing enjoyment to me, after the bondage of my early life.

Must love be ever treated with profaneness as a mere illusion? or with coarseness as a mere impulse? or with fear as a mere disease? or with shame as a mere weakness? or with levity as a mere accident? whereas it is a great mystery and a great necessity, lying at the foundation of human existence, morality, and happiness,--mysterious, universal, inevitable as death.

Men who pass most comfortably through this world are those who possess good digestions and hard hearts.

A soul occupied with great ideas performs small duties.

My own feeling of concern arises from seeing how much moral injury and suffering is created by the superstitions of the Christian mythology.

I think that few people are aware how early it is right to respect the modesty of an infant.

While feeling far less injured by toil than my friends took for granted I must be, I yet was always aware of the strong probability that my life would end as the lives of hard literary workers usually end, - in paralysis, with months or years of imbecility.