1 Cor 2:1-2 relate to Christ and Him crucified:
1 Corinthians 2:
1 And I, brethren, when I came to you, came not with excellency of speech or of wisdom, declaring unto you the testimony of God.
2 For I determined not to know any thing among you, save Jesus Christ, and him crucified.
Paul went into the regular church congregation to expound upon Jesus Christ and Him crucified (the gospel) - vs 2.
1 Cor 2:7, 14 relates to the mystery, the hidden wisdom which was discussed among them that are perfect:
1 Corinthians 2:
6 Howbeit we speak wisdom among them that are perfect [Greek teleios = mature, of full age]: yet not the wisdom of this world, nor of the princes of this world, that come to nought:
7 But we speak the wisdom of God in a mystery, even the hidden wisdom, which God ordained before the world unto our glory:
...
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.
I understand why you have to conflate the gospel with the mystery, the hidden wisdom ... but that does not change the mystery, the hidden wisdom into the gospel.
You are not to align Scripture to your dogma. You are to align your dogma to Scripture and where you are in error, you are to let go of the error.
1 Thessalonians 5:21 Prove all things; hold fast that which is good.
hold fast that which is good ... everything else ... let it go. You have got to let go of your error ...
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