正直就是在没人看的时候做正确的事。

A man is but the product of his thoughts. What he thinks， he becomes.

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 poet's pen is mightier than the warrior's sword.

True sustainability means leaving the land better than we found it for future generations.