The Inner Witness of the Holy Spirit

Even though evidence and arguments , such as the arguments of natural theology, can be used to support the [rational warrant of] the believer’s faith, they are not properly the basis of that faith. The proper basis of Christian faith for the believer is the inner witness of the Holy Spirit himself. God, for us, is not just the conclusion of a syllogism. He is the Living God of Abraham, Isaac and Jacob dwelling within us and empowering us to live the Christian life.

So how does the Christian know the Christian faith is true? He knows it through the self-authenticating witness of the Holy Spirit, who lives within him.

 

(William Lane Craig, Defenders podcast, Existence of God Part 27, 18/04/2011)