245. Now I need to describe how light flows into the three levels that make up the human mind. From our birth, the forms that are receptive of warmth and light or love and wisdom (which as already noted [223] are in a threefold pattern or on three levels) are translucent and let spiritual light pass through, the way clear glass lets physical light through. This is why we can be raised up all the way to the third level in respect to our wisdom. These forms are not opened, though, until spiritual warmth, or the love of wisdom, is united to the spiritual light. It is through this union that the translucent forms are opened level by level.

This is like the light and warmth of the world's sun and plant life on earth. The winter light is just as bright as summer light, but it does not open anything in seeds or trees. However, when the warmth of spring is united to that light then things open. The resemblance stems from the fact that spiritual light is analogous to physical light and spiritual warmth is analogous to physical warmth.