We claim there never was a nothing. We claim that first there was God, then there was something.
By definition, the effect cannot be greater than the cause, so the something is less than the God thing. Because it is second and therefore less, the second thing cannot comprehend the first thing.
The something is rational and comprehensible in its nature, because we are on its level, and comprehension is a species of circumscription. Hence, science. By definition, you can mentally circumscribe all that is not ontologically bigger.
But all beings equal to you or bigger than you, you cannot comprehend. You cannot fully comprehend another human, for example. Hence, supra (not anti) reason.
The God thing is also rational and comprehensible to every intelligence larger (of course, there are none.) To those smaller intelligences, He is partly comprehensible and infinitally not comprehensible. Not because He withholds, but because He existed first.
The method of thought is the same in all instances: we wonder so that we might know. We wonder at creation, then know it by science. We wonder at God, then know him by faith (which is NOT blind belief, but is a specific mode of knowledge.)