“Justification in its essence is a legal or forensic term, a term that belongs to the realm of the Law Court. It means ‘to declare just,’ and ‘to declare righteous.’ It is the opposite of condemnation. The Christian has moved from a state of ‘condemnation’ to one of ‘justification’… we do not justify ourselves before God. God justifies us… entirely apart from us and our works. It is not the result of any merit that is in us.” (D. Martyn Lloyd-Jones)
For more on this subject, please visit the Systematic Theology page.