How do you know Christianity is the right one out of so many?
I really want to know, because an eternity of suffering depends on our choice here.
First, we need to understand why a God is needed. Humans don't have the ability to tell a future which could possibly affect our life. The only way for humans to get to a future scenario is through a God who knows. Now then all left is how to identify whether such a God exists and who He is.
Second, if such a God exists then how will He convey His truth to humans. The easiest is for the all capable God to show Himself up to all humans to tell them directly what could possibly lying ahead, especially when it is said a hell is waiting for humans. So we need to attention to what this God would say about why He has to hide behind even with the full knowledge that a hell is lying ahead of humans.
In Christianity, God granted an permanent and final covenant to humans for them to be saved by faith. Thus He cannot show up to everyone or else no one can be saved by faith as he already saw with his eyes who God is. This covenant which God has to hide behind in order for humans to be legitimately saved is brought to us by Jesus but no other names.
Now since God cannot openly show up to everyone for the covenant to take effect, then how can His truth convey? If shows up which will nullify the covenant, if He doesn't show up at all, then no one even knows that He has such a covenant for humans at all. So the only way which works is for Him to show Himself up to a group of chosen eyewitnesses then for the testimonies of these eyewitnesses to flow among humans such that God's truth can convey. This is the only way.
Now then the question is how many eyewitnesses are enough to do the job. And how things are witnessed. It is about how God's deeds and speeches are witnessed by the chosen eyewitnesses, but not through a middle media. All OT prophets are direct eyewitnesses of God, they don't acquire their information from any middle person. Mohammad on the other hand had his information mostly from a self claimed angel. That's not supposed to be the way of human witnessing.
God as who we know today in Christianity is portrayed by different OT prophets (eyewitnesses) in different spots of history all consistently telling a God of same characteristics. God also bound the testimonies of His chosen prophets into one document such that He shows that He knows the importance of multiple account testimonies.
If an important piece of news only broadcast by CNN but not any other media, not Fox News, not BBC not CBC not any other media then you may doubt about how credible this piece of news is. If however it is broadcast by all the media all at once, you will realize how credible it is. In order for God to show that He knows this too, He bound the testimonies of all His eyewitnesses into one book. The god of Mohammad doesn't seem to understand this. Perhaps he's just as clueless as humans are in regards to the nature of human witnessing.
The Bible God has a good reason to hide behind due to a covenant. In order to communicate in an alternative way, He chose many prophets as His eyewitnesses such that a consistent figure (the OT God) is portrayed through their testimonies for His truth to be conveyed on a multiple account basis (while showing that He understand this process of human witnessing). That's the situation.
Mohammad's god on the other hand, has to employ an angel but not directly convey information to him, and he didn't bind the testimony thus made it a single account one. He doesn't seem to know the importance of multiple account witnessing.
If there is an important news the US government would like his people to be informed of, what should it do? It will employ all its media power with all the news agencies to broadcast this news as far-reaching as possible.
Acts 1:8 (NIV2011)
and you will be my witnesses in Jerusalem, and in all Judea and Samaria, and to the ends of the earth.
There are 26 verses about preaching the gospel (good news) to all nations.
26 Bible verses about The Gospel To The Nations
Does quran have the equivalent? For a god of Mohammad who doesn't seem to understand human witnessing, then it doesn't seem so.
That is to say, other than showing up to every single human, the next most efficient way for a truth to convey is through effective human witnessing. How effective thus is the question to ask.