I do not merely think it to be the only true religion. I know it to be so. I know that religion is as necessary to the human race as breathing. I know that there must be a true religion. I know that all other religions save that revealed by God and recorded in the Bible are false. Reason alone can provide sufficient grounds for that. Moreover, I know by the gift of divine faith that the contents of the Christian religion are true with the very truth of God.
I deny that either a Mahometan or a Buddhist, or a member of any other non-Christian religion can ever have the same kind of certainty concerning his religious beliefs as that which is given by that particular grace of God known as the gift of Christian faith. Meantime, that others are convinced of the truth of their various religions merely shows that the human mind is limited; that men are affected by heredity and environment; and that they are prone to form very decided opinions without sufficient knowledge. But that does not affect the truth as it is in itself, and does not make all religions equal in value.
It would be very surprising were that not so. Religion is natural to man; and if men try to construct religious systems in accordance with their natural instinct and needs, they will naturally hit on some truth. And the basic natural truths in their various systems tend to content those who know no other religion, and to distract their attention from the accompanying human errors.