You know what you believe, but could you explain it to someone who has serious doubts about the claims of Christianity?
There is a widespread belief that reason and faith are incompatible and antithetical. Faith is seen as a subjective and emotional quality upon which the weak or ignorant rely. With clarity and simplicity, Dr. R.C. Sproul discusses the rationality of Christianity. He focuses on defending the basic demands of truth in two of the most crucial apologetic topics: The existence of God and the authority of the Bible.
The defense of faith is not intellectual vanity. It is a God-appointed task, as you must be able to give an account of the hope you have when testifying of the Lord to the world.