The human being is a most curious creature. He thinks he has a soul, but he is a soul; he has a body.

Every improvement in the circumstances of the society tends either directly or indirectly to raise the real rent of land, to increase the real wealth of the landlord, his power of purchasing the labour, or the produce of the labour of other people.

对上帝的观念越强大和生动，它将越影响我们的生活和性格。

大脑是我们迄今为止在宇宙中发现的最复杂的东西。