1, we should have a long-term vision and the spirit of exploring truth. The pursuit of truth can't be smooth sailing, and you may "fall into the pit" (encounter setbacks) on the way, but this can't stop the progress.

2, don't be willing to be a frog in the well, immersed in your own imaginary plain career. People who have no ambition will naturally not experience setbacks because of pursuing their ideals (a certain goal), that is, "falling into the pit."