A. W. Pink distinguishes between Justification and Sanctification. Comparing CHRIST FOR US and CHRIST IN US.
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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 admits of degrees, and is never perfect in this life; the other is complete and admits of no addition. The one concerns my state, the other has to do with my standing before God. Sanctification produces a moral transformation of character, justification is a change of legal status: it is a change from guilt and condemnation to forgiveness and acceptance, and this solely by a gratuitous act of God, founded upon the imputation of Christ’s righteousness, through the instrument of faith alone. Though justification is quite separate from sanctification, yet sanctification ever accompanies it.