Christian philosophy is a catch-all expression for a two-millennia tradition of rational thought that attempts to fuse the fields of philosophy with the religious teachings of Christianity.
How one can "reconcile" Christianity with philosophy, or not
As with any fusion of religion and philosophy, the attempt is difficult because classical philosophers start with no preconditions for which conclusions they must reach in their investigation, while classical religious believers have a set of religious principles of faith that they hold one must believe. Indeed, due to these divergent goals and views, some hold that one cannot simultaneously be a philosopher and a true adherent of a revealed religion. In this view, all attempts at synthesis ultimately fail.
Others hold that a synthesis between the two is possible. One way to find a synthesis is to use philosophical arguments to prove that one's preset religious principles are true. This is known as apologetics and is a common technique found in the writings of many religious traditions, including Judaism, Christianity and Islam, but is not generally accepted as true philosophy by philosophers. Another way to find a synthesis is to abstain from holding as true any religious principles of one's faith at all, unless one independently comes to those conclusions from a philosophical analysis. However, this is not generally accepted as being faithful to one's religion by adherents of that religion. A third, rarer and more difficult path is to apply analytical philosophy to one's own religion. In this case a religious person would also be a philosopher, by asking questions such as:
What is the nature of God? How do we know that God exists?
What is the nature of revelation? How do we know that God reveal ...