John 17:3 New International Version (NIV)
3 Now this is eternal life: that they know you, the only true God, and Jesus Christ, whom you have sent.
The great news we have is that God can be known by us. There is nothing in this world of greater value than to know the Lord Jesus Christ. It is the personal knowing that you have. The knowing that begins with belief in God. With the knowing comes a life long relationship building that gets deeper and deeper, and thus the knowing increases faith.