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.

The act of writing is an act of optimism. You wouldn't take the trouble to do it if you felt it didn't matter.

数学之美在于它能够连接看似无关的思想。

没有比热爱食物更真挚的爱了。

逻辑后果是愚者的稻草人，却是智者的灯塔。