The packages would travel a conveyor belt. Sometimes at a turn in the conveyor, a package would get stuck. The packages behind it would start to pile up on the small package. If no one was there to clear the jam, the weight from all of the boxes behind would crush it.
Our lives are not so different. Everything runs smoothly if we are going straight. When life has a turn, we have to have someone who can help with the jams. Building a wall is one thing. Turning the corner takes more skill. Don't let the obstacles of life crush you. Use them to build a better life. I hope you have a great week and Merry Christmas!