Well, you have 2 columns. On the left one the nice ways to solve the problem. On the right one the nasty ways. The good news is that nature will always find a way to solve the problem. The bad new is that if we don't use the solutions from the left, nature will use the ones from the right.
https://www.youtube.com/watch?v=F-QA2rkpBSY&feature=list_oth...
says something like:
Well, you have 2 columns. On the left one the nice ways to solve the problem. On the right one the nasty ways. The good news is that nature will always find a way to solve the problem. The bad new is that if we don't use the solutions from the left, nature will use the ones from the right.