The new birth—spiritual birth—is essential to our salvation. We are born body and soul—two dimensional. Once we trust Jesus for our salvation we become three dimensional—body, soul, and Spirit. It’s the Spiritual dimension that gives us the capacity to know and grow in the wisdom and knowledge of God. Jesus said: “You must be born again.”
The Gospel of John opens with: "In the beginning was the Word,the Word was with God, the Word was God." Jesus, the "Logos" is everything God the Father is. He has eternally existed--A Child was born, but a Son was given. Jesus took on flesh in Bethlehem. He died both physically and spiritually on the cross, but was resurrected spiritually with a new physical body--a body designed for the new heaven and earth.
1st John is the Family Book. It tells us how to become the family of God in Christ. Chapter 2 tells us that to know the Lord is to love the Lord and to love the Lord is to explore His Word and follow His Spirit, If you really want to know the Lord, you will come to love Him. If you love Him, you will want to explore all the Spiritual assets that you have in Him--all the blessings of the heavenlies. Yesterdays are gone and cannot be changed. Today is the first day of the remainder of our lives. In Christ, we can change our lives, our habits, our interests, and our ultimate destination. Try it! You'll like it!
Unless we have intimate personal experience with God through His great love, we can't really understand it. 1 John 3:1-3, introduces us to God's great love. Literally, it is an "other worldly love" according to the Apostle John. It is impossible to know or understand unless you have shared in it through the Spiritual Birth that accompanies our salvation. In Christ we share that love--a love that makes it possible for us to "love our enemies.... and to pray for those who abuse us." Don't knock it unless you have tried it!
This is a question that has existed since the beginning of the church. It was the religious leaders, not the down-and-outers, not the criminals, not the thieves and robbers. The religious, those who let their relationship with God degenerate into meaningless ritual. When we allow our relationship to be expressed only on Sundays, we too join them in meaningless religious exercises. Worship is how you live; your priorities and values in life; It our 24/7 example of what God is worth to us. For many, it may be the only glimpse of Jesus they will ever see.