Thematic Bible: Why the law was given

so then as it was by one offence towards all men to condemnation, so by one righteousness towards all men for justification of life. For as indeed by the disobedience of the one man the many have been constituted sinners, so also by the obedience of the one the many will be constituted righteous. But law came in, in order that the offence might abound; but where sin abounded grace has overabounded, read more.
in order that, even as sin has reigned in the power of death, so also grace might reign through righteousness to eternal life through Jesus Christ our Lord.