The past is always tense, the future perfect.
蠢人做蠢事,也可理解为傻人有傻福。
预测未来的最好方法就是创造未来。
剑鞘保护剑的锋利,自己却满足於它自己的迟钝。
If you let yourself be undisciplined on the small things, you will probably be undisciplined on the large things as well.