Well of course I agree it comes from God. Without God, we cannot do ANYTHING. But the way I understood what you said–maybe I misunderstood it–would be tantamount to saying:
“God gives us grace to believe in Him. If we do not believe in Him, it is not our problem, because GOD is the one who is giving us the grace”.
Please clarify, I am slightly confused. I mean, basically, if you have not formed your conscience according to Church law on PURPOSE, that is wrong. If you have unintentionally done so, you need to try to correct it.