UnderstandReally??? Read my posts, because I did answer it. So, answer me this. Do they understand it or just hear it? Because as I answered your question the natural man cannot understand, right? As you said before, they need Grace to believe, in other words they need the Spirit to be born again to see and understand the things of God, correct?
and i spoke of Matt slick and JD Martin not your erroneous understanding of 1Cor 2:14 which ignores the context
1 Corinthians 1:21 (KJV 1900)
21 For after that in the wisdom of God the world by wisdom knew not God, it pleased God by the foolishness of preaching to save them that believe.
and showing sone did in fact believe
and even the carnal at Corinth were able to understand and believe the gospel though they could not handle the meat
1 Corinthians 3:1–4 (KJV 1900)
And I, brethren, could not speak unto you as unto spiritual, but as unto carnal, even as unto babes in Christ. 2 I have fed you with milk, and not with meat: for hitherto ye were not able to bear it, neither yet now are ye able. 3 For ye are yet carnal: for whereas there is among you envying, and strife, and divisions, are ye not carnal, and walk as men? 4 For while one saith, I am of Paul; and another, I am of Apollos; are ye not carnal?