This document discusses making a "second switch" when learning a foreign language that allows one to think in that language rather than translating in their head. It draws an analogy to how children learn their native language by deducing the underlying grammar and then can easily learn new languages when young before translation becomes ingrained. The document claims there is an additional powerful switch people can flip that provides a new understanding and allows one to operate more efficiently, like the switch from babbling to using language as a child.