Made known to all nations for the obedience of faith

But now is made manifest, and by the scriptures of the prophets, according to the commandment of the everlasting God, made known to all nations for the obedience of faith:
(Romans 16:26)

1/ What has been made known - The mystery, the Gospel .
2/ The means used to make the Gospel known - By the scriptures .
3/ The end to which the Gospel is preached - For the obedience of faith .