The Father & Son Mystery... who will know?

There are many religions in the world, and all of them have different doctrines. Some believe that there are three Gods in heaven, "the Father, Son and Holy Spirit", others say there are two, the "Father & Son". But what is the truth? If we are reading the Bible, we can read that there is only ONE GOD (Isa. 43:10-11, 44:8, 45:5, 21, 46:9), and nor will there be one after Him. You can't find any verse from the bible that says there are two Gods, or three Gods in heaven. There any many christian that don't understand the great mystery of God (1 Timothy 3:16). Why? What is the reason they can't understand? No matter how you explain to them they can't see the truth! Well, actually the answer is also written in the Bible. Remember what the Lord Jesus told on Luke 10:22, "No one knows who the Son is except the Father, and no one knows who the Father is except the Son and those to whom the Son chooses to reveal him." So it is very clear here that this is the reason why only few knows they mystery of God, who really He is. So no matter what one does if God will not reveal it to him/her, he/she can't understand it. So be thankful if God revealed it to you who He is.