A small fly struggled desperately in vain, trying to fly over the closed glass window. The wailing wings tell the fly's strategy: to repeatedly impact in the direction of "light" However, everything is so useless. Crazy efforts can't bring any hope of survival. No matter how hard flies try to fly over the transparent glass, everything they do is in vain. However, the poor fly still confidently hopes to achieve the ultimate goal through the most primitive efforts. This fly is doomed to failure. It was exhausted on the windowsill. On the other side of the room, ten paces away, the window was open. With a little time, a different direction and a different angle, this little insect can reach the long-awaited outside world. With a little effort, it can get rid of the bad luck hanging over its eyes. Here is the possibility of breaking through the window, which seems simple but not easy to do. It can be seen how important re-election is! Why not try another method-a completely different method? Why do you have to hang yourself from a tree? You stubbornly believe that success will only beckon if you stick to one road to the end. Why is the simple truth there, but it can never be realized? There is no doubt that flying through the window is tempting for flies. But unfortunately, it is this reckless method that ruined the life of the fly. Blind persistence is not a good recipe for success. This method can't really help us achieve our goals in life. In fact, sometimes it may even become the crux of the problem. If you are thoughtless, fickle, and pin your hope of breakthrough on repeated persistence, you may kill your chances of success. We often encounter setbacks because our ability is not enough to finish something temporarily, or our working methods are not reasonable, so we must analyze and judge, reposition our ability and the difficulty of this matter, and find the best way to get close to the goal. This is the meaning of re-selection. In the face of difficulties, we need to rationally analyze the situation and make wise choices. Re-selection is the result of rational analysis, an objective and reasonable way and method, which should be respected, but it is not enough and will not work.