Of all things that God created , it's only air that he made invisible . Why do you think he made air invisible ?
Good point, I guess.but there is so much more than air that is invisible.
most of creation is invisible to us isn't it?
well just a quick off the cuff list... probably not thought out well..
but things like germs, bacteria, enzymes , magnetism, plasma, light, darkness , hell , heaven.. on and on.. law on law, powers on powers, authorities on authorities .. these things are all His creation too. maybe man only want to give him credit for what they see or think they see , sometimes and sometimes not .