The "natural man" Calvinist myth/tradition has been debunked dozens of times on this thread already.just an fyi, Blain ... I am one who does not believe 1 Cor 2:14 includes the gospel of the Lord Jesus Christ, which is the power of God unto salvation ... and this has been explained to Magenta more than a few of times.
1 Corinthians 1:
17 For Christ sent me not to baptize, but to preach the gospel: not with wisdom of words, lest the cross of Christ should be made of none effect.
18 For the preaching of the cross is to them that perish foolishness; but unto us which are saved it is the power of God.
19 For it is written, I will destroy the wisdom of the wise, and will bring to nothing the understanding of the prudent.
These verses do not state that those who are perishing cannot understand the message of the cross ... they do understand ... and they consider the message of the cross foolish. iow, they suppress the truth in unrighteousness due to holding man's wisdom (the wisdom of words – 1 Cor 1:17 or the wisdom of the wise – 1 Cor 1:19) above the wisdom of God.
1 Corinthians 2:14 But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned.
There is no indication in 1 Cor 1:18 that those who are perishing cannot know the gospel.
However, 1 Cor 2:14 states the deeper things of God referred to in 1 Cor 2:6-16 cannot be known by the natural man ... why? Because the natural man spoken of in 1 Cor 2:14 consists of:
1) those who are not born again ... they have not taken that first step which would allow them to know spiritual matters which go beyond the scope of the gospel; or
2) those who are born again but are immature in their walk with the Lord ... either because they are newly born again and need to feed on the milk of the word or they are carnal believers who follow men as opposed to maturing in the things of God ... these carnal believers also need to continue to feed on the milk of the word according to 1 Cor 3:1-4.
more info to follow concerning 1 Cor 2:14 and the context within which the verse sits ...
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However abandoning it would collapse the Reformed house of cards. So they don't.