1 John 5:20
And we know that the Son of God has come, and he has given us understanding so that we can know the true God. And now we live in fellowship with the true God because we live in fellowship with his Son, Jesus Christ. He is the only true God, and he is eternal life.
What was the primary reason Jesus came? So that we through Him being born again could be restored back into a relationship with God. So that we could know God. Far to many believers are satisfied with getting born again and then continuing to live life on their own instead of taking time to get to know their Heavenly Father who desires to walk with them every day. There is only one way you will experience true peace, joy, and contentment in life and that is in knowing God; not just knowing about Him. As the scripture above reveals we live in fellowship with God through our fellowship with Jesus. The disciples of Jesus day did so spending time with Jesus every day. For us we do so by spending time in the Word each day for Jesus is the Word that became flesh. When we take time to fellowship with the Lord through His Word, we fellowship with our God and Father. Get to know the Word (Jesus), and you get to know your God and Father who loves you and desires to love on you. There is no one nor anything that will make your life complete except knowing God. So the door of fellowship unto the Father opens to us when we choose to open our Bible. For when we do we open the door to God.