Your use of ellipses in your selective quoting of John MacArthur does not lend credibility to your question which you so earnestly desire people to answer. Who truly comes to Christ with the intention of holding back some sin to be hidden and toyed with secretly(as if it were possible)all the while claiming to have confessed all sin and be saved? John MacArthur's understanding of the gospel is that sinners who desire to be saved are under the conviction of the Holy Spirit and thus rightly desire to turn away from sin and turn to Christ for salvation. No sinner who is truly desiring salvation will be willfully keeping some sins back for personal enjoyment and pleasure. Just like no bride who truly loves her husband and has surrendered her single life in marriage to him entertains the thought of perhaps maintaining a boyfriend on the side. No way! When a wife marries her husband, she pledges to remain faithful and fully intends to do so. Future sins may occur and for a time, interrupt those intentions, of course, but on her wedding day she intends to give herself to that man alone, no other committment is desired. That is the picture of a sinner embracing Christ. That is the gospel. We as Christ's bride pledge ourselves to Him, fully intending to live faithful to Him forever, not planning and waiting to give some to another on the side.