If you put a buzzard in a 6 x 8 foot pen that is entirely open at the top, the bird, in spite of its ability to fly, will be an absolute prisoner. The reason is that a buzzard always begins a flight from the ground with a run of 10 to 12 feet. Without space to run, as is its habit, it will not even attempt to fly but will remain a prisoner for life in a small jail with no top.
The ordinary bat that flies around at night, a remarkably nimble creature in the air, cannot take off from a level place. If it is placed on the floor or flat ground, all it can do is shuffle about helplessly and, no doubt, painfully, until it reaches some slight elevation from which is can throw itself into the air. Then, at once, it takes off like a flash.
A bumblebee, if dropped into an open tumbler, will be there until it dies, unless it is taken out. It never sees the means of escape at the top, but persists in trying to find some way out through the sides near the bottom. It will seek a way where none exists until it completely destroys itself.
In many ways, there are a lot of people like buzzards, the bat, and the bumblebee. They are struggling with all their problems and frustrations, never realizing that the answer is right there "Above" them.