Christian philosophy is almost an oxymoron. Philosophy is very dangerous and you can see it in the early fathers. Take Origen, a great man certainly, a very accomplished writer, one who knew much. Yet what happened? Condemned as a heretic by Council, many of his works destroyed by the Church because they were dangerous.
It is too bad Origen did not limit himself to the Christian faith, but wandered, being led astray by philosophy.
You can see much the same in Tertullian. While a great teacher, he too seems quite clearly to hold heretical beliefs at the end.
So the major problem with reading people who are writing as man writes and thinking as man thinks is that they do not stick to a faith once delivered. So you have to norm them.
A lot of that has really been done already for you if you read the fathers. For there are many who have every credential to be a church father who aren’t even included in those we would think of as a church father because they were heretical in their beliefs and writings.
JJ