Just as being born in the flesh – the person has never existed on earth, the same from God – born of God, a New Creation in Christ appeared, which previously had never been, this is a New Creature, the old has died; if the old creature, according to Adam, does not die, a new Creature in Christ and by Christ cannot appear. Hence it is very important to understand the birth from God.
The main purpose of Jesus Christ in His appearance in this world is to preach the Kingdom of God. His appearance in this world is, first of all, evidence that there is actually another, spiritual world, a world having nothing to do with the physical, temporary world. Beginning His ministry in this world, Jesus Christ first said: “the time is fulfilled, and the Kingdom of God is at hand” – then said: “Repent and believe the Gospel!” (Mark 1:15)