John MacArthur, On What Justification Accomplishes

Justification…is what moves us into a new relationship with God so that we can walk in the light as He is in the light (cf. 1 John 1:7). It is what brings peace with God in place of enmity (Rom. 5:1). It is what makes us heirs according to the hope of eternal life (Titus 3:7). It is the heart of all God’s work on our behalf, beginning with His foreknowledge before the foundation of the world and carrying on to our final glorification with Him (Rom. 8:29-30). And thus it is the very heart of the gospel according to Jesus.” (John MacArthur, The Gospel According to Jesus)