Gregory E. Ganssle explains when certain issues take us beyond the parameters of scripture we must think both Christianly and philosophically.
Christian philosophers have traditionally sought to think Christiainly by thinking in the mode of faith seeking understanding. This mode was introduced as early as Augustine (354-430) and has been articulated throughout the history of the church. What it means to operate in this mode is that Christian philosophers recognize that they know some things by faith in a reliable authority. For example, they know some things simply because they see them in the Scriptures. As God’s written revelation, the Scriptures are reliable indicators of what is true. Philosophers begin with this knowledge (we could call it faith-knowledge) and try to reach another kind of knowledge (understanding-knowledge). Understanding knowledge is knowledge gained through the application of one’s own reason.
Faith seeking understanding is not an approach for turning mere beliefs into knowledge. Rather, it is a mode for turning one kind of knowledge into another kind. It turns faith-knowledge into understanding-knowledge. We begin with God’s revelation in the Scriptures, recognizing that we know certain things based on it. We then apply our reasoning to these things to see if we can also grasp the same things by our reason. Grasping some issue by our reason often involves a process of unfolding what is only suggested or hinted at in the Scriptures. Thus philosophers may differ from each other in what they claim to have grasped.
 Gregory E. Ganssle, Four views: God & Time (Downers Grove, Il.: InterVarsity Press, 2001) p. 11-12.