The issue is not that we can comprehend God, the issue is can we comprehend the part He has chosen to reveal in scripture. Yes we must struggle to connect the dots without adding our own speculation into the mix.
We must stick with the range of word meanings found in well accepted lexicons, and not redefine words to pour our theology into the text. We must be careful not to add words to expand the revealed scope such as "the things" becoming "all the things" when the text might contextually provide a narrow scope, i.e. some of the things.
Bible study can help us grow and become better witnesses, and more helpful advisors. And if anyone, especially me, makes a claim without providing a reference to a verse or passage that supports it literally, beware.
Not all of us are seminary grads versed in the subtleties of ancient languages or privy to well accepted lexicons. Some of us just read the Bible. I could reference verses that present salvation from the sinner's perspective and verses that present salvation from God's perspective. I always come to the conclusion that any confusion about the process is strictly my own. God has it all figured out and its under His control and every human born will be fairly judged or pardoned. And I do believe that the saints' response to God's gracious pardon in which they give Him all the credit and glory is real and sincere.