For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, even his eternal power and deity; so that they are without excuse:
All Commentaries on Romans 1:20 Go To Romans 1
Augustine of Hippo
AD 430
Invisible things are seen in a special and appropriate way. When they are seen they are much more certain than the objects of the bodily sense, but they are said to be invisible because they cannot be seen by mortal eyes.