The 32 numerology is contained within the « Revelation of John »

22.v1 Then he showed me the river of the water of life, sparkling like crystal, flowing from the throne of GOD and of the Lamb down the middle of the city’s street. On either side of the river stood a tree of life, which yields twelve crops of fruit, one for each month of the year ; the leaves of the tree serve for the healing of the nations.

The quote above tells us of the « tree of life » which is the basic element of the Jewish esoteric science known as the Cabbala. The Cabbala is a primordial science of relationship between form and number whereby the universe is viewed as existing in four stages, the closest to us (and the furthest from direct union with GOD) being the ordinary material world, called « Assiyah » the « World of Action ». The medieval theosophists described each world as embodied in a « tree of life », a diagram of cosmic law containing 32 pathways.