What is Apologetics?
The vindication of the Christian philosophy of life against the various forms of the non-Christian philosophy of life. (Dr. Van Til)
What is a Worldview?
A network of pressuppositions (which are not verified by the procedures of natural science) regarding reality (metaphysics), knowing (epistemology), and conduct (ethics) in terms of which every element of human experience is related and interpreted." (Dr. Banhsen various lectures)
Biblical Basis for Apologetics:
1 Peter 3:15 American Standard Version (ASV)
15 but sanctify in your hearts Christ as Lord: being ready always to give answer to every man that asketh you a reason concerning the hope that is in you, yet with meekness and fear:
The Foundation of Christian Apologetics
A truly Christian defense of the faith must never fail to exalt Christ as Lord over all, including argumentation and reasoning. An apologetic that builds on any other rock than Christ does not honor the greatness of divine wisdom; it is foolishly and audaciously erected on the ruinous sands of human authority. - Dr. Greg Bahnsen - Presuppositional Apologetics: Stated Defended.