So you're saying the conclusion that something with no substance would also have no form is irrational?
No more irrational than speaking about space without time, and time without space. Take away one, you can't have the other.
This puts an interesting philosophical spin on God's existence before (if we can even say that) creation.
What's even more interesting, is God's rebuttal to this:
I am that I am
No references to space, or time.
Truly, it is profound beyond words.