Part of the sacred geometry, Merkaba represents light, spirit and body.  Merkaba is made up of 2 interacting tetrahedrons with the bottom triangle represents femininity and rotates in a counter-clockwise direction, and the top relates to masculinity and rotates in a clockwise direction. Simultaneously pulling power up from the earth (feminine) and drawing energy down from the heavens (masculine). This combination of forces is said to bring about balance through the 3-Dimensional energy field that it creates.