Righteous in Christ

I am reading Abide in Christ by Andrew Murray.  Murray speaks of the Christian's union with Jesus and His gift of righteousness in Christ:

"He [the Christian] is not now content with only thinking of the imputed righteousness as his robe; but, putting on Jesus Christ, and seeking to be wrapped up in, to be clothed upon with Himself and His life, he feels how completely the righteousness of God is his, because the Lord our righteousness is his.  Before he understood this, he too often felt it difficult to wear his white robe all the day:  it was as if he specially had to put it on when he came into God's presence to confess his sins, and seek new grace.  But now the living Christ Himself is his righteousness--that Christ who watches over, and keeps and loves us as His own; it is no longer an impossibility to walk all the day enrobed in the loving presence with which He covers His people."