Have you ever had one of those days fishing where it seemed like you could do no wrong? Like everything you tried resulted in fish being caught? And not only fish being caught, but large fish being caught? This was all probably due to the moon and what phase the moon was in. That's right, something as simple as what phase the moon is in can have an effect on your fishing success.
Christian folklore claims the Man in the Moon is Cain, the eternal Wanderer, doomed forever to circle the Earth. In addition, there is a Talmudic tradition that says it is the face of Jacob etched out on the gleaming lunar disk.
Full moon nights are also the perfect setting for all the harmful omens of the world to get out. You have black magic and all sorts of witchcraft happening on a full moon night. You can also trace the word "lunatic" to "lunar", which is the Latin word for 'moon'. The etymological link between the two words will definitely lead you to conclude that mental health and the full moon may have a link mythically, if not medically.