In the OT days, God dwelt in a "place" Now it is very specific that the presence of God is not in a single place. NT and present day christians have the holy spirit living in them.
When I say GOd can inspire you to do things, I am talking about when Scripture was first written. I believe now a days very rariily will GOd write it out on a wall for you. God's voice is not some thundering flash of lighting. It is still, small and quiet. Many times it says "to be still and wait quietly before the Lord" and to "be still and know that I am God"
Alot of things changed when Jesus came to earth, the old covenant was replaced with the new covenant. (such as sin, and forgiveness, Jesus is how you can be forgiven of sins, instead of sacrificing a bull)(i'm not saying that abrahams covenant was discontinued)
yes, he does harden Pharoahs heart. BUt that is not forcing him to believe. He did intervene, he sent his son Jesus as our sin offering, and he has given all of us the chance, we CHOOSE whether to accept it or not, like right now, it seems as you are choosing to reject it.
And if you look at it this way, we all deserve to die and go to tell. no where does it say that we are worthy, or righteouss on our own. So GOd sent his son for the sake of the elect, those that would believe. THere is room for everyone in Heaven, but not everyone will accept it, lets face it, sin is mankinds downfall.
Our worship is different now, we do not offer sacrifices, we do not have one day of atonement. We do not have one certian group that can be priests.(Levites) Our religious situation is way different, Polytheism is not such a problem as is people not caring abou religion at all. The office of Prophets is not what it was like. IT says in the NT that people want to see miracles to believe, but that even then they will not believe. Miracles are not common like they were in the days of Elijah and Moses.
Hope that helps
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"We may ignore, but we can nowhere evade, the presence of God."