5.  ‘Now, if I do that I would not,’ adds the apostle, extricating himself and giving himself fair-play and his simple due among all his misery and self-accusation—­’Now, if I do that I would not, it is no more I that do it, but sin that dwelleth in me.’  Or, again, as William Law has it:  ’All our natural evil ceases to be our own evil as soon as our will turns away from it.  Our natural evil then changes its nature and loses all its poison and death, and becomes an holy cross on which we die to self and this life and enter the kingdom of heaven.’  My dear brethren, tell me, is your sin your cross?  Is your sinfulness your cross?  Is the evil that is ever present with you your holy cross?  For, every other cross beside sin is a cross of straw, a cross of feathers, a paste-board and a painted cross, and not a real and genuine cross at all.  The wood and the nails and the spear all taken together were not our Lord’s real cross.  His real cross was sin; our sin laid on His hands, and on His heart, and on His imagination, and on His conscience, till it was all but His very own sin.  Our sin was so fearfully and wonderfully laid upon Christ that He was as good as a sinner Himself under it.  So much so that all the nails and all the spears, all the thirst and all the darkness that His body and His soul could hold were as nothing beside the sin that was laid upon Him.  And so it is with us; with as many of us as are His true disciples.  Our sin is our cross; not our actual transgressions, any more than His; but our inward sinfulness.  And not the sinfulness of our will; that is no real cross to any man; but the sinfulness of our hearts against our will, and beneath our will, and behind our will.  And this is such a cross that if Christ had something in His cross that we have not, then we have something in ours that He had not.  He made many sad and sore Psalms His own; but even if He had lived on earth to read the seventh of the Romans, He could not have made it His own.  His true people are beyond Him here.  The disciple is above his Master here.  The Master had His own cross, and it was a sufficient cross; but we can challenge Him to come down and look and say if He ever saw a cross like our cross.  He was made a curse.  He was hanged on the tree.  He bore our sins in His own body on the tree.  But his people are beyond Him in the real agony and crucifixion of sin.  For He never in Gethsemane or on Calvary either cried as Paul once cried, and as you and I cry every day—­To will is present with me!  But the good that I would I do not!  And, oh! the body of this death!