Paul said that to Pagans. But if you are saved, you are in Christ. Why are you going to the world for anything. Friendship with the world is emnity with God. The world lies in the power of the evil one. Why seek anything from this world when the Father has made Christ to be wisdom.
Christ is the completion and fulfillment of Truth. But if you are a medical doctor, you HAVE to study anatomy and biology. You can’t just get all your surgery cues from the Scriptures and the teachings of Jesus. However you cannot exceed the ethical boundaries set by Scripture.
Same goes for immersing yourself in the literature, philosophy, architecture etc...of classical antiquity. Those things can’t “save” you...but they can enrich your spirit and the life of your neighbors and glorify God. When the great wisdom of the classical world is applied with a Christian heart and Gospel focus.
“To the Jews I became like a Jew, to win the Jews. To those under the law I became like one under the law (though I myself am not under the law), so as to win those under the law.
21 To those not having the law I became like one not having the law (though I am not free from God’s law but am under Christ’s law), so as to win those not having the law.
22 To the weak I became weak, to win the weak. I have become all things to all people so that by all possible means I might save some.
23 I do all this for the sake of the gospel, that I may share in its blessings.”
- 1 Corinthians 9