And God blessed them, saying, “Reproduce and multiply and fill the water in the seas, and the birds will multiply on the land.” And there was evening and there was morning, the fifth day. — Genesis 1:22-23
Everything with life from the Lord in it reproduces and multiplies beyond measure—not so much during our physical lives, but to an astounding degree in the next life.
In the Word, reproducing or being fruitful applies to the elements of love, and multiplying, to the elements of faith. Fruit born of love holds the seed by which it multiplies so prolifically.
The Lord’s blessing in the Word also symbolizes fruitfulness and multiplication, because these are its result.
from Secret of Heaven, Volume 1, Sections 22-23