You have to be fearless in the pursuit of what sets your soul on fire.

The past is a foreign country; they do things differently there.

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.

学习的最好方式是教学。

科学是分类学家的乐园。

Sustainability isn't a cost—it's an investment in our future.

释义：荣华富贵不过是短暂的梦境，如同九月的霜一样容易消逝。老病死生是每个人都要面对的，无法由他人替代，人生的酸甜苦辣只能自己承担。