Mental processes are tools for living, and their worth is in their use.

The most important thing in directing is to have a clear vision of what you want to achieve.

The only way to learn a new programming language is by writing programs in it.

称王天下的国家，民众富有；称霸天下的国家，谋士富有；勉强存在的国家，大臣富有；丧失王道的国家，仓库富有。点评：贞观二年，唐太宗让有关部门去清点隋朝国库留下的物资。等数字报上来后，太宗大为惊讶。原来，「隋文（帝）不怜百姓而惜仓库，比至末年，计天下储积，得供五六十年……」