I dont doubt it, I agree fully, I am sure everyone agrees. Both that he is in heaven, and that he believed he would one day be in heaven. We share the same opinion. That leads to what I am actually getting at:
2 Samuel 12:13-23, the story of David and Beersheba's baby. We all know what happened, refresh yourself if need be. Verse 23 is my focus:
2 Sam 12
23 But now he is dead, wherefore should I fast? can I bring him back again? I shall go to him, but he shall not return to me.
David says that he shall one day (in death) go to his child. We both agree that David went to heaven and expected to go to heaven, but why does David think the child will be there too? Its clear, like ps 51 says, that child was conceived in sin also right? It never had a chance to cry out for forgiveness or repent, so then why does David expect to see the child again? What made the child fit for heaven. This is where I dont want opinion, I only want biblical answers if you have them.