The meaning of smile now cry later tattoo is too great pleasure will bring about sadness. "Smile now cry later" tells us a truth. Everyone has emotions, and emotions are not static. Emotions can change with each other. Everything must be mastered, otherwise it will develop in the opposite direction.
Everything must grasp a degree, that is appropriate. Everything, whether good or bad, can change with each other. A wise man should know where "degree" lies, that is, to understand the development law of things, to restrain the infinite expansion of self desire, and to know enough for many things.