What does it mean that tragedy is the foreshadowing of comedy?

It's a tragedy for you that you were rejected. But girls say this is the foreshadowing of comedy. There are two explanations: First, girls still have a good impression on you, but they have not developed into boyfriend and girlfriend; Second, if you are rejected this time, you may learn something from it, which may make your next confession more mature or make it easier to develop a new relationship, which is equivalent to learning from a mistake.

My understanding is for your reference. Hee hee.