The Old Testament is not outdated for our modern world

The Old Testament is a message addressed to a people who had to be detached from the pagan, polytheistic mentalities of antiquity. It contains nothing outdated for our modern world, which has become pagan again and enslaved by its own idols, denying the difference between good and evil. It teaches us to give God His place as the origin and destination of everything, the source of life and the final end of man, who is a pilgrim traveling toward the Absolute; this is the great moral and religious revolutiaon of the law of Moses. The People of God must be drawn out of their enslavement so as to live up to the divine election that is theirs.

Robert Sarah, Catechism of the Spiritual Life

Amen, amen.