Part of the broader task of Christian scholarship is to help create and sustain a cultural milieu in which the gospel can be heard as an intellectually viable option for thinking men and women.
William Lane CraigBut the Bible says that the unreached will be judged on a quite different basis than those who have heard the gospel. God will judge the unreached on the basis of their response to His self-revelation in nature and conscience. The Bible says that from the created order alone, all persons can know that a Creator God exists and that God has implanted His moral law in the hearts of all persons so that they are held morally accountable to God (Rom. 1.20; 2.14-15). The Bible promises salvation to anyone who responds affirmatively to this self-revelation of God
William Lane CraigThe way in which I know Christianity is true is first and foremost is the basis of the witness of the Holy Spirit in my heart. And this gives me self-authenticating means of knowing Christianity is true wholly apart from the evidence. And therefore, even if in some historically contingent circumstances the evidence that I have available to me should turn against Christianity, I do not think that controverts the witness of the Holy Spirit.
William Lane Craig