ISB ~ Romans 5 v20
to increase the trespass:The Torah aggravated the problem of sin because it defined the boundaries of wrongdoing (7:7) but could not restrain Israel from crossing them (7:12-24). The purpose was to induce Israel to acknowledge its weakness and cry out for divine help.
• The Law was given that grace might be sought; grace was given that the Law might be kept (St. Augustine, On the Spirit and the Letter 34).