Have you ever thought about the possibility of another dimension? another world outside of our own?
The truth is, there are two worlds... both co-existing together, but not mutually interacting with eachother in entirety.

If you look back in history, the reason that both of these worlds were disconnected from eachother is that man disbelieved and disobeyed God, forcing Him to withdraw Himself and the spiritual world from man.

Because mankind turned his back on God, it put man and God at odds. God created man and loves man but because of mans stubborness to accept the reality of the other world (and Gods love) not many have regained the relationship man and God once had.
In reality, mankind as a whole has tried to forget about his past connection to God and the spiritual world.

As time has gone on, humans have withdrawn themselves from God more and more.
It isn't God who has chosen to not reveal Himself, it is mans stubborness that causes his inability to see Him.

God has revealed Himself in many ways in His creation, the way that creation is constructed and how it works.
If you really study science you will see that God reveals Himself in almost everything, His mark is everywhere and on everything.
Nothing can rightfully disprove the bible or the validity and truth of God.

Man is without excuse because all things show the glory of God, no matter how hard anyone tries to debate that fact, it remains a FACT.

But whats most important...One man made it possible for these worlds to connect once more.
So both God and man could interact and once again fellowship together.

That man is Jesus Christ, you can fight it all you want but the bible is clear that the only way to heaven is through Jesus' blood and in that blood we might be seen as pure and holy before God.