The Church of Christ is continually represented under the figure of an army; yet its Captain is the Prince of Peace; its object is the establishment of peace, and its soldiers are men of a peaceful disposition. The spirit of war is at the extremely opposite point to the spirit of the gospel.
Yet nevertheless, the church on earth has, and until the second advent must be, the church militant, the church armed, the church warring, the church conquering. And how is this?
It is in the very order of things that so it must be. Truth could not be truth in this world if it were not a warring thing, and we should at once suspect that it were not true if error were friends with it. The spotless purity of truth must always be at war with the blackness of heresy and lies.
C. H. SPURGEON
The Metropolitan Tabernacle Pulpit, vol. 5 (London: Passmore & Alabaster, 1879), 41.
Apologetics may be simply defined as the defense of the Christian faith. The simplicity of this definition, however, masks the complexity of the problem of defining apologetics. It turns out that a diversity of approaches has been taken in defining the meaning, scope, and purpose of apologetics.
We may distinguish four functions of apologetics, though not everyone agrees that apologetics involves all four. Such opinions notwithstanding, all four functions have historically been important in apologetics, and each has been championed by great Christian apologists throughout church history.
The first function may be called vindication or proof, and involves marshaling philosophical arguments as well as scientific and historical evidences for the Christian faith. The goal of this function is to develop a positive case for Christianity as a belief system that should be accepted. Philosophically, this means drawing out the logical implications of the Christian worldview so that they can be clearly seen and contrasted with alternate worldviews.
The second function is defense. This function is closest to the New Testament and early Christian use of the word apologia, defending Christianity against the plethora of attacks made against it in every generation by critics of varying belief systems. This function involves clarifying the Christian position in light of misunderstandings and misrepresentations; answering objections, criticisms, or questions from non-Christians; and in general clearing away any intellectual difficulties that nonbelievers claim stand in the way of their coming to faith.
The third function is refutation of opposing beliefs. This function focuses on answering the arguments non-Christians give in support of their own beliefs. Most apologists agree that refutation cannot stand alone, since proving a non-Christian religion or philosophy to be false does not prove that Christianity is true. Nevertheless, it is an essential function of apologetics.
The fourth function is persuasion. By this we do not mean merely convincing people that Christianity is true, but persuading them to apply its truth to their life. This function focuses on bringing non-Christians to the point of commitment. The apologist’s intent is not merely to win an intellectual argument, but to persuade people to commit their lives and eternal futures into the trust of the Son of God who died for them.
Cabal, T., Brand, C. O., Clendenen, E. R., Copan, P., Moreland, J., & Powell, D. (2007). The Apologetics Study Bible: Real Questions, Straight Answers, Stronger Faith. Nashville, TN: Holman Bible Publishers.