People once believed that the Moon was more important than the Sun. They saw that daytime was light even when the Sun was hidden by clouds. They felt the Sun was not as necessary as, and, was less powerful than, the Moon.
People weren’t aware that the Moon had no light of its own, but merely reflected the light of the Sun. As far as they could see, the Sun shone only when it felt like it, on nice, clear days.
The Moon, however, shone in the dark, when it was needed, especially in the ages before electric lights. And the Moon didn’t always show its light, suggesting its great power—not to mention the astonishing event of a solar eclipse, when the Moon took out the Sun.
Witches have always been connected with the Moon. Their ceremonies often take place according to the Moon’s phases. Traditionally, not only witches, but herbalists, shamans, and apothecaries have picked certain plants only at night and only when the Moon is full or new.
The date of the Christian holiday Easter is also based on the Moon’s phases.
Still today, some people cite the Full Moon as the cause of madness. People feeling out of sorts are often relieved to discover there is a Full Moon. They attribute their state to the Moon’s effect.