From Robert Candlish, Discourse III of his "Life in a Risen Saviour". A quote from the introduction and from the conclusion.
" 'For if the dead rise not, then is not Christ raised: and if Christ be not raised, your faith is vain; ye are yet in your sins.'
"Ye are yet in your sins because Christ is yet in your sins. And your faith, committing you to Christ, uniting you to Christ, makes you sharers with him in whatever is his condition, in whatever is his fate. You cannot be better off than he is. The utmost your faith can do for you is to make you one with him, to identify your interests with his, to secure that as he is, so you shall be. If, therefore, he is yet in your sins, then of necessity you must be yet in your sins also.
"He was 'in your sins' when he died. They were about him; they were upon him; they were his. He owned, he felt them to be his. 'Innumerable evils have compassed me about; mine iniquities have taken hold upon me, so that I am not able to look up; they are the more than the hairs of mine head: therefore my heart faileth me' (Psalm lx.12). So your iniquities took hold of him as if they were his own. He made them his own. Making common cause with you, putting himself in your place, he was in the midst of them, he was under them. I repeat, Jesus Christ our Lord was 'in your sins' when he died.
(...)
"Well may Paul say, 'If Christ be not raised, your faith is vain; ye are yet in your sins.'
"But on the other hand, if Christ is risen, how complete, how surely and gloriously complete is our deliverance! He is rid of our sins now. And if we are in him, we are rid of them too, in the very same sense, and to the very same extent that he is. He was in them once; in their guilt, in their curse; so thoroughly in them that there was no escape for him either from a criminal's death, or from a criminal's grave. But he is not in them now. Nor are we, if we are in him. 'There is now no condemnation to them who are in Christ.' Our faith in him is not now vain: for 'he died for our sins, and rose again for our justification.' "
" 'For if the dead rise not, then is not Christ raised: and if Christ be not raised, your faith is vain; ye are yet in your sins.'
"Ye are yet in your sins because Christ is yet in your sins. And your faith, committing you to Christ, uniting you to Christ, makes you sharers with him in whatever is his condition, in whatever is his fate. You cannot be better off than he is. The utmost your faith can do for you is to make you one with him, to identify your interests with his, to secure that as he is, so you shall be. If, therefore, he is yet in your sins, then of necessity you must be yet in your sins also.
"He was 'in your sins' when he died. They were about him; they were upon him; they were his. He owned, he felt them to be his. 'Innumerable evils have compassed me about; mine iniquities have taken hold upon me, so that I am not able to look up; they are the more than the hairs of mine head: therefore my heart faileth me' (Psalm lx.12). So your iniquities took hold of him as if they were his own. He made them his own. Making common cause with you, putting himself in your place, he was in the midst of them, he was under them. I repeat, Jesus Christ our Lord was 'in your sins' when he died.
(...)
"Well may Paul say, 'If Christ be not raised, your faith is vain; ye are yet in your sins.'
"But on the other hand, if Christ is risen, how complete, how surely and gloriously complete is our deliverance! He is rid of our sins now. And if we are in him, we are rid of them too, in the very same sense, and to the very same extent that he is. He was in them once; in their guilt, in their curse; so thoroughly in them that there was no escape for him either from a criminal's death, or from a criminal's grave. But he is not in them now. Nor are we, if we are in him. 'There is now no condemnation to them who are in Christ.' Our faith in him is not now vain: for 'he died for our sins, and rose again for our justification.' "