In Mark 16, we read that when the resurrected Lord first appeared to his disciples, he said to them, "Go into the whole world and proclaim the gospel to every creature. Whoever believes and is baptized will be saved; whoever does not believe will be condemned." I italicized the last verse for emphasis. It seems that we must believe to be saved, even if we cannot love Jesus perfectly, for his mercy is great. Then if we do not believe and think it won't matter, it matters most seriously!