Well, it's one thing following God and it's another knowing God.
Paul said I believe that the jews understood the true concept of God, in that I mean, God revealed his nature to them, yet time after time they did not follow him, Paul talked about the Jews having the law but the gentiles actually kept the law without even knowing it, Paul talks in length about this in "Romans".
It's certainly something to think about, there are many issues that go hand in hand with this, for instance, destiny and free will.
An example of this would be a blind man that Jesus heals and says concerning him that his being blind was so as to display God's glory.
Interesting..........