I do not have to be married to be fruitful and multiply.  Anyone in Jesus has that ability–whether it is those with severe physical limitations, the mentally disabled, the elderly, the young widow, singles, etc… Why?  Because the Holy Spirit births life.  He has from the very beginning:

“In the beginning God.”  Verse 1.
“The Spirit of God was hovering over the waters.”  Verse 2.

What happened next?  Life.

Why?

Covenant communion brings life.

We see this also in the beginning of the New Testament.  The book of Matthew.  Chapter 1.

“Mary was found to be pregnant through the Holy Spirit…because what is conceived in her is from the Holy Spirit” (Mt 1:14)

When the Holy Spirit is around, he brings conception that births radical creation. It’s not just something that happened with the birth of the world, it is a necessary prerequisite for Christian “life”:

John 3:

⁴ “How can someone be born when they are old?” Nicodemus asked. “Surely they cannot enter a second time into their mother’s womb to be born!”
⁵ Jesus answered, “Very truly I tell you, no one can enter the kingdom of God unless they are born of water and the Spirit. ⁶ Flesh gives birth to flesh, but the Spirit^[b] gives birth to spirit. ⁷ You should not be surprised at my saying, ‘You^[c] must be born again.’ ⁸ The wind blows wherever it pleases. You hear its sound, but you cannot tell where it comes from or where it is going. So it is with everyone born of the Spirit.”^[d]
9 “How can this be?” Nicodemus asked.
¹⁰ “You are Israel’s teacher,” said Jesus, “and do you not understand these things? 
 
Whenever life happens the Holy Spirit is right there in the process of conceiving this new form of greatness, whether it be the creation of the world, the birth of God Almighty into a human baby, or the causing of someone to be “born again.”  This is life.  And this is the command:  Be fruitful and multiply.  How?

By our union with God Almighty.  Our times of greatest intimacy with our God, when our spirit is united with his Holy Spirit, life is conceived, grows and is birthed.  And not just once.  Because fruitfulness is not just once.  Multiplication is not just once and one time.  Life in communion with God’s Holy Spirit is life that happens over and over in an abundance with fruitfulness that cannot be contained.  It may not be as obviously seen as in one’s own child but it is seen in the life of the hardened heart that becomes tender to the Lord, it is observed in the move of God that brings the rebellious sons and daughters back to the heart of the Father and the family, and we watch it happen in the life of a nation that nationally repents and commits itself to the Lord (go Uganda).  THIS is life.  Conceived and brought to fruition by the Holy Spirit.  Available to ALL.

Go.

Be fruitful and multiply.