Here is Bavinck on justification:
"...by it we understand that gracious judicial act of God by which he acquits humans of all the guilt and punishment of sin and confers on them the right to eternal life.
Certainly there can be no peace of mind and conscience, no joy in one's heart, no buoyant moral activity, or a blessed life and death, before the guilt of sin is removed, all fear of punishment has been completely eradicated, and the certainty of eternal life in communion with God fills one's consciousness with its consolation and power.
But this benefit--the complete forgiveness of sin--is so immense that the natural human intellect cannot grasp and believe it."
Herman Bavinck, Reformed Dogmatics Volume 4: Holy Spirit, Church and New Creation, p. 179