If you put a buzzard (秃鹰) in a cage without a roof, the bird will be a prisoner. Even though it can fly, it can't fly through the open roof. The reason is that a buzzard always begins a flight from the ground with a short run of 3 or 4 meters. Without space to run, he will not even try to fly, but will stay in his small jail for the rest of his life.
The ordinary bat that flies around at night can not take off from the ground. If it is placed on the ground, all it can do is shuffle about helplessly. If it reaches a higher place, it will be able to throw itself into the air. Then it takes off quickly. But on flat ground, it will never fly.
A bee dropped into a cup will stay there until it dies, unless it is taken out. It never sees the means of escape at the top, but keeps trying to find some way out through the sides near the bottom. It will look for a way where none exists, until it completely destroys itself.
In many ways, there are lots of people like the buzzard, the bat and the bee. They are struggling with all their problems and frustrations, not realizing that the answer is right there above them.