What is Justification by Faith?

Justification is one of the most important doctrines for a Christian to know and live by. Thus, by missing it, we could miss the whole Gospel. Justification is the gracious act of God by which he declares a sinner righteous through faith. What does this practically mean and involve? In this message, Pastor David Platt unpacks the meaning of Justification by faith, and how the Christian is able to walk in this truth.