Thematic Bible: Why the law was given

So then, as through an offense of one man was for condemnation for all men, so also through a righteousness of one man was for justification of life for all men. For as through the one man's disobedience the many were led sinful, so also through the obedience of the one man the many will be led righteous. And the law entered so that the offence might abound. But where sin abounded, grace was more abundant, read more.
so that, as sin reigned in death, so also grace might reign, through righteousness, for eternal life through Jesus Christ our Lord.