So when I speak of the water and the blood, I speak not of the things that you can see with the eye

So I will give you the water.

Now this is what I would give you in the form of water, for something must come out of nothing and life out of death.

“This is He that came by water and blood even Jesus Christ, not by water only, but by water and blood.” So these are symbols of birth.

This is the great mystery of the incarnation, the death, and the resurrection.

So the knowledge of what to do is called water, the “water of truth”; but the use of that lovingly is called the flowing (shedding) of the blood.

if you took a little bit, one drop of this water

For water is the truth and the blood is the application of that truth.

but such knowledge cannot bring Christ Jesus to birth

If you do it, you are applying the blood.

For this is the mystery of the incarnation that comes by water and blood.

Except you be born of water and the spirit, ye can in no wise enter the kingdom of heaven.

But not to DO it is to try to bring this being to birth by water only. We are told this is the one who came by water and the blood.