Why did the Apostle Paul finalize the epistle to the Romans affirming that God is the only wise?

According to Paul's thought, God is the source of wisdom and all knowledge, for the apostle Paul, to boast of being wise is vanity: "If any of you think you are wise by the standards of this age, you should become "fools" so that you may become wise. For the wisdom of this world is foolishness in God's sight. As it is written: ´He catches the wise in their craftiness´, and again, ´The Lord knows that the thoughts of the wise are futile´", 1 Corinthians 3:20.
Humility is opposed to vanity. The kingdom of God belongs to the poor in spirit, that is, to those who have a spirit of humility and devotion to God; this spiritual gift is so important that Jesus presents it as the first beatitude: "Blessed are the poor in spirit, for theirs is the kingdom of heaven", Matthew 5:3
Only to God corresponds the title of wise according to the epistle: "but know revealed and made known through the prophetic writings by the command of the eternal God, so that all the Gentiles might come to the obedience that comes from faith - to the only wise God be glory forever through Jesus Christ! Amen.", Romans 16:26-27.
But also, glory only belongs to God, man must live according to the fear of God (constancy, firmness, devotion, equanimity, stability): "Brothers and sisters, think of what you were when you were called. Not many of you were wise by human standards; not many were influential; not many were of noble birth. But God chose the foolish things of the world to shame the wise; God chose the weak things of the world to shame the strong.", 1 Corinthians 1:26-27; "Therefore, as it is written: ´Let the one who boasts boast in the Lord.´", 1 Corinthians 1:31.

In metaphysics when it is affirmed that someone is wise or full of the holy spirit, what is being said is that that person reached the perfection of virtue or, in other words, that person is completely similar to God: "Be perfect as your heavenly Father is perfect", Matthew 5:48. According to the christian faith he purpose of spirituality is to achieve the likeness to God, but not to boast of being wise but to reach eternal life, that is, the worship of wisdom: "This is eternal life that they know you the only true God", John 17:3.
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