I find the trinity to metaphysically imply procreation.
The Bible treats the Holy Spirit as if He was ... a She -- gentle, nurturing, etc., very feminine in that time's presentation of such.
So ... we have the Father, the Holy Spirit Mother, and the Son Child. Can we say "procreation", boys and girls? For a metaphorical certainty!
Thus the trinity is the symbol for procreation -- "Go throughout all the earth and multiply".
And, so we have ... and we continue to do ... long after our proscribed optimal population density ... has been far and painfully exceeded.
Will we ever be able to overcome our dictated manifest before we crush ourselves to death?
Not as long as religion rules so many.