What is the origin of the idiom "in one's element" and when to use it?

The phrase "in one's element" originated from ancient Greek beliefs about the four classical elements and refers to being in an environment that aligns with one's inherent nature or temperament. This idiom can be used in professional settings, such as when a musician is performing flawlessly on stage or when an athlete is excelling in their chosen sport. It can also be used in personal contexts, such as when someone is engaged in a hobby or a passion that brings them great joy and fulfillment.