Christianity ... has produced the iniquities of the Inquisition, the egotism and celibacy of the monasteries, the fury of religious wars, the ferocity of the Hussite, of the Catholic, of the Puritan, of the Spaniard, of the Irish Orangeman and of the Irish Papist; it has divided families, alienated friends, lighted the torch of civil war, and borne the virgin and the greybeard to the burning pile, broken delicate limbs upon the wheel and wrung the souls and bodies of innocent creatures on the rack; all this it has done, and done in the name of God.

Emulation is active virtue; envy is brooding malice.

Christianity has ever been the enemy of human love.

Great men always have dogs.

Why is youth so short and age so long?

There is no knife that cuts so sharply and with such poisoned blade as treachery.

Love, the one supreme, unceasing source of human felicity, the one sole joy which lifts the whole mortal existence into the empyrean, was by it [Christianity] degraded into the mere mechanical action of reproduction.