"According as he hath chosen us in him
before the foundation of the world, that
we should be holy and without blame
before him in love:
Having predestinated us unto the
adoption of children by Jesus Christ to
himself, according to the good pleasure
of his will,"
Ephesians 1:4-5

Before God created the world, in His plan
for man, He marked him out for sonship.
Man was to hold the place of a son in the
Father God's love. He also was the answer
to the Father's desire for children.