?凡事必有因

... Wherefore I Said 所以我说 Every why has a wherefore 凡事必有因 ; 凡事皆有因 Wherefore I threw a penny 因此我抛个便士 ...

?凡事皆有因

不满足是进步的开始 Every why has a wherefore. 凡事皆有因 The proof of the pudding is in the eating. 空谈不如实践 .

?事出有因

Every why has a wherefore 事出有因。 As you brew, so must you drink 自搬石头自压脚。