The poem about finding your own shortcomings in silence is to ask if you don't know, if you can't learn, if you can't learn, you can't be virtuous. If you didn't see it, it would be ridiculous; See it without knowing it, although it is true; If you know what you are doing, you will be trapped. -Xun Kuang
Shortcomings: refers to people's shortcomings; Shortcomings are the opposite of advantages.
Shortcomings are conclusions drawn after comparing with similar things. The key point is to realize your own shortcomings and try to correct them.