Though inseparably connected, effectual calling or the new birth and justification are quite distinct. The one is never apart from the other, yet they must not be confounded. The one gives me a place in God's family, the other secures me a standing before His throne. By the one I am drawn to return in penitence to the Father's house, by the other I am given the best robe which fits me for His presence. Second, it differs from sanctification.
Sanctification is moral or experimental, justification is legal or judicial.
Sanctification results from the operation of the Spirit in me, justification is based upon what Christ has done for me. The one is gradual and progressive, the other is instantaneous and immutable. The one concerns my state, the other has to do with my standing before God. Though justification is quite separate from sanctification, yet sanctification ever accompanies it. Third, it differs from forgiveness.