Thematic Bible: Why the law was given

Therefore, as one trespass led to condemnation for all men, so one act of righteousness leads to justification and life for all men. For as by the one man's disobedience the many were made sinners, so by the one man's obedience the many will be made righteous. Now the law came in to increase the trespass, but where sin increased, grace abounded all the more, read more.
so that, as sin reigned in death, grace also might reign through righteousness leading to eternal life through Jesus Christ our Lord.