100. The heat and light which proceed from the Lord as a Sun are what are pre-eminently called spiritual; and they are called spiritual in the singular because they are one. Wherefore, when the spiritual is mentioned in what follows, there is understood both of these together. It is from that spiritual that the whole of that world is called spiritual. Through that spiritual, everything of that world derives its origin and hence also its name. That heat and that light are called spiritual because God is called a Spirit, and God as a Spirit is the spiritual going forth. God from His Own Very Essence is called Jehovah; but by means of this Proceeding, He vivifies and enlightens the angels of heaven and the man of the Church. For this reason also vivification and enlightenment are said to be effected by means of Jehovah's Spirit.