This lecture costs $2

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Lecture 4, The Assurance of Salvation (Part 1):

Perhaps you have a lot in common with a 16th century lawyer turned monk, Martin Luther. It was his personal struggle with the demands of God’s law that led him to the most blessed assurance of his salvation when he finally understood the biblical doctrine of justification by faith alone. In this lecture Dr. Sproul will explain, if your justification is not understood correctly, then your Christian growth will be a frustrated endeavor.