A wise man said: before you speak, let your words pass through three gates. At the first gate, ask yourself, "Is it true?" At the second gate, ask "Is it necessary?" At the third gate, ask, "Is it kind?"
解释:诚信,是国家的根基,是保护大众赖以生存的根本。
人们不会使用手持计算器来学习计算,但是却会忘记算术。