Thematic Bible: Why the law was given

So then as through one trespass, all men were condemned; even so through one act of righteousness, all men were justified to life. For as through the one man's disobedience many were made sinners, even so through the obedience of the one, many will be made righteous. The law came in besides, that the trespass might abound; but where sin abounded, grace abounded more exceedingly; read more.
that as sin reigned in death, even so grace might reign through righteousness to eternal life through Jesus Christ our Lord.