Every life is in many days, day after day. We walk through ourselves, meeting robbers, ghosts, giants, old men, young men, wives, widows, brothers-in-love, but always meeting ourselves.
In science, we must be open to the possibility that our most cherished theories could be wrong.
Literature is the bridge between the seen and the unseen worlds.
当随机化不可行时,匹配方法可以是一个强大的工具。