Quite often we do things on impulse.
我们做事往往很冲动。
Such being the case, mistakes are bound to happen and we might land in trouble.
一旦冲动，我们常会出错，也会陷入困境。
Before we do anything of importance, therefore, we should think twice.
因此我们在做任何大事之前，就应三思。
As the saying goes, "Look before you leap. "
俗话说：“三思而后行。”