For the time has come for judgment to begin at the house of God. If it begins first with us, what will happen to those who don't obey the Gospel of God?
Obey . .. the gospel ... is an excellent term for conversion, and it may only be deplored that current religious culture has found so little use for it.  It is as if, by leaving out such a harsh word as "obey," they may be able to claim salvation upon some other basis.  However, obedience of the truth is a sine qua non of salvation in Christ.  Paul revealed fully the fate of persons who will not "obey the gospel"  (2 Thessalonians 1:8).