Calvin Stating the Obvious?

Calvin's Institutes I.x.1-3
Calvin has already shown how creation witnesses to the attributes of God. He has also shown that the fact that sin goes unpunished points to a future day of vindication for the righteous, and punishment for the wicked. (See I.v.1-10)

Now he seeks to show that Scripture also attests to the same attributes.

I have to confess that I find his line of reasoning difficult here. Earlier, Calvin has made bold assertions about the way nature attests to the glory of God. Yet due to the corruption of man, the 'spectacles' of Scripture are required in order to see nature's proclamation. This perhaps explains why the Psalms are used extensively to demonstrate the witness of creation. Now, in this section, he says Scripture agrees with this testimony. Well, obviously! If Scripture is creation's interpreter to corrupted minds then what else should we expect?

Perhaps there is value in stating the obvious, though. Sometimes, having heard something explained, people do not take the next obvious step. We can be a bit dull at times.