43. Verse 22 And God blessed them, saying, Be fruitful and multiply, and fill the waters in the seas; and let birds be multiplied upon the earth.

Everything that has life in it from the Lord is fruitful and multiplies without limit. This does not happen during a person's lifetime, but in the next life it does so to an astonishing extent. In the Word 'to be fruitful' has reference to matters of love, while 'to multiply' has reference to matters of faith. The fruit of love contains the seed by which it multiplies itself to so great an extent. The Lord' s blessing also means, in the Word, fruitfulness and multiplication, for they are the outcome of that blessing.

Verse 23 And there was evening, and there was morning, a fifth day.

6314. As it is with light, so it is with the heat that is vital to a person's existence. In no way at all does that vital heat originate in the heat radiated by the sun in the world; rather, it originates in spiritual heat, which is love and radiates from the Lord. This heat is what angels have. Consequently the amount of vital heat a person has is determined by the amount of love he has. His body however is warmed by worldly heat, as is his sensory awareness within it; yet vital heat flows into that worldly heat and imparts life to it. Differences in the purity and intensity of this heat are akin to variations in the clarity of the light. This vital heat is what one should understand by the holy fires mentioned in the Word, and therefore heavenly loves are meant by those fires. But in a contrary sense that worldly heat is what one should understand by the fires of hell, and therefore hellish loves and the desires that go with them are meant when these fires are mentioned in the Word.