The Seed of Life is a geometric shape with seven circles overlapping. In Sacred Geometry, it represents the seven days of Creation. Rainbows, Eastern chakras systems, Western musical scales, all are seven in number. The Platonic solids and the well-known Flower of Life and Fruit of Life are based on this fundamental pattern. Our Creator is symbolized by first inner circle (Spherical Octahedron). Where the first two circles intersect, it represents the creation of Light by the Lord. They form a shape known as the Vesica Pisces – from within we see both the eye of G*D and the symbol of the Fish.
We often use the Tripod of Life in our teaching the concepts of balance within Mind-Body-Spirit. When the Seed of Life symbol is expanded and brought into a third dimension, the Platonic solids are formed. It is the Octahedron, when it spins on its axis, that becomes the Merkaba of dimensional Creation again. Here is a very detailed explanation: consciousawareness.info/sacred-geometry
The oldest example of the Seed of Life can be found at the ancient Osirian temple in Abydos, Egypt. Later representations are found in synagogues and churches across the globe.
To those concerned about the “Pagan ” or “New Age” implications and associations of using or discussing such symbols, please consider that G*D invented mathematics as a multidimensional harmonic language for us to kythe and be in awe of his Creation.