No one teaches you how to think about money in medical school or residency. Yet, from the moment you start practicing, you must think about it. You must consider what is covered for a patient and what is not.
Maybe there's a whole other universe where a square moon rises in the sky, and the stars laugh in cold voices, and some of the triangles have four sides, and some have five, and some have five raised to the fifth power of sides. In this universe there might grow roses which sing. Everything leads to everything.