Romans 6:7

For he that hath died is justified from sin.

Paul returned in this statement to the legal phase of justification "in Christ" (as fully discussed under preceding verses); but something new is added here. Justification, far from being accomplished by faith only, is also dependent upon the believer's death to sin, in the sense of being "in Christ."

He that died ... is another way of saying, "He that believed on the Lord Jesus Christ and was baptized into Christ for the remission of his sins" is justified. No others need apply!