The cistern contains: the fountain overflows.

The most sustainable building is the one that is already built.

The passions that incline men to peace are fear of death, desire of such things as are necessary to commodious living, and a hope by their industry to obtain them.

The best fertilizer is a farmer's knowledge mixed with nature's wisdom.

数学的本质不是把简单的事情复杂化，而是把复杂的事情简单化。