In contrast to the philosophies of atheism and pantheism, Jesus Christ put love at the center of life. Love is the central concern in Christ‘s apologetic to the world. Both John 13:35 and John 17:20- 23 indicate that the world will not know who Jesus is through the means of his ultimate apologetic-love among believers-unless believers demonstrate his love first to each other and then to the watching world. The New Testament emphasis on agape is utterly unique among world religions. The statement “God is love” (1 John 4:8, 16) cannot be said in any other view of life. The ultimate demonstration of love is the cross, and that is the painful, self-sacrificial, other-directed love to which we are called.
Art Lindsley. Love, the Ultimate Apologetic: The Heart of Christian Witness (pp. 160-161). Kindle Edition.
Thus, the apologetic task will consist, not of externally verifying the Christian presupposition but, of applying it by (1) bringing God’s truth and commands to bear upon the lives of unbelievers, appealing to the image of God in them (distinguishing between present remnants of man’s original nature and the ever-present nature of fallen man), pointing out that every fact of the world bears witness to God, and (2) doing an internal critique of the non-Christian’s system, calling down its idols, and pointing out the absolute necessity of Christian presuppositions if logic, factuality, history, science, and morality are to have any meaning, validity, and application at all. The Christian apologetic will not concede intellectual ground to Christianity’s cultured despisers or allow them to exploit theoretical foundations to which they have no legitimate claim without depending on the Christian faith. Thus, part of the Christian’s reasoned defense of the faith will be an aggressive offense.