(Jungian Psychology) The four functions are Reason, Feeling, Intuition, and Sensation. These are also the four quarters of the Magician, grouped around the Center which is the Imagination.
The goal of magick is the integration of the four functions together with the Imagination.
Separately, the Four Functions are the Four Beasts; Integrated, the Four Functions are Man on the Cross of the Elements; the Four Functions integrated with Imagination are Woman.
Reason, Feeling, Intuition, Sensation, and Imagination united under WILL is the God-Man.