St. Paul on Wisdom (Sophia).
“But we speak the wisdom of God in a mystery, even the hidden wisdom, which God ordained before the world unto our glory.” (1 Corinthians 2:7)
“Put on the full armor of God, so that you can take your stand against the devil’s schemes. For our struggle is not against flesh and blood, but against the rulers, against the authorities, against the powers of this dark world and against the spiritual forces of evil in the heavenly realms. Therefore put on the full armor of God, so that when the day of evil comes, you may be able to stand your ground, and after you have done everything, to stand.” (Ephesians 6:11-13)
The writings of St. Paul span the range from being fully orthodox (the Pastoral letters of Timothy, Titus and Philemon which are not considered authentically Paul) to his supposed esoteric teachings, that Valentinus and Marcion claim were instrumental in the development of their gnostic-leaning versions of Christianity. As Elaine Pagels writes in her The Gnostic Paul, Paul designed his letters (Epistles) cryptically to speak to those who had insight into the deeper teachings and he wrote more generally to those who did not have this but who could gain from a more simplified writing.