Is it okay for Christians to study philosophy? With this question I regard the general makeup of philosophy. Many claim that both philosophy and Christianity contradict and therefore cannot coexist. I do not mention this to ask, 'can a Christian study philosophy,' because it obviously is possible. Many philosophers have made themselves famous by finding clever ways to isolate and hide evidence of a God and the discoveries by them is what is fundamentally taught, so I ask, is it okay for Christians to study philosophy?
Let's take a look at Paul.

The book of Acts details the spread of the Gospel from Jerusalem into wider Judea and Samaria, then off through Syria, Asia, Greece, before it concludes with Paul preaching the Gospel in the capital city of the Roman Empire. If we follow along with the way the Christians are preaching the Gospel, we find that once they start talking to Gentiles the references to the Hebrew scriptures drop dramatically.

When we arrive at Acts 17, Paul is standing in the Areopagus, preaching the Gospel to Greek philosophers. He doesn't quote the Law or the Prophets or the Psalms, because they have (little to) no experience with the Hebrew scriptures. Instead, Paul quotes (from memory!) passages from Aratus' Phaenomena and Epimenides' Cretica (Acts 17.28).

And when we read Paul's personal letters, we find: he paraphrases the thought process found in the Jewish book Wisdom of Solomon (Romans 1.18-32; and probably in several other places), he cites Menander's Thais (1 Corinthians 15.33), and again from Epimenides' Cretica (Titus 1.12).

These were works of drama, poetry, and wisdom, both Jewish and Gentile. Paul certainly didn't agree with everything he found in those books, but he had no problems reading them and assimilating some of, in his mind, their best points. And really, Paul's magnum opus, his letter to the Romans, functions as a philosophical argument.

Yes, Christians may study philosophy.