Blessed be the God and Father of our Lord Jesus Christ, who according to His abundant mercy has begotten us again to a living hope through the resurrection of Jesus Christ from the dead to an inheritance incorruptible and undefiled and that does not fade away, reserved in heaven for you who are kept by the power of God through faith for salvation ready to be revealed in the last time.
(1 Peter 1:3-5)
We must be begotten of the Spirit before we can be born of the Spirit, birth will happen at the end of this age.
I believe that those who have the spirit of God dwelling in their hearts, are born of the spirit. Once they are born of the spirit, they will be denying the flesh and you will see the fruits of the spirit in their lives. The spirit will be putting them to death and they will be overcoming the flesh.
Jesus said this
John 3
Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God. That which is born of the flesh is flesh; and that which is born of the Spirit is spirit.
We must be born of the spirit to enter Gods kingdom. We ask for Gods kingdom to come into our hearts every day so that we can do his will. How can his kingdom enter into our hearts if we not born of the spirit? To be born of the spirit is to be born of God. Once we are born of the spirit, we are born again. Our old life should be dying and we should be living by the will of God and obeying him. Walking not after the flesh, but after the spirit. This is being born of the spirit.
If we are led by the spirit, we must be born of the spirit
Galatians 5
This I say then, Walk in the Spirit, and ye shall not fulfil the lust of the flesh.
For the flesh lusteth against the Spirit, and the Spirit against the flesh: and these are contrary the one to the other: so that ye cannot do the things that ye would.
But if ye be led of the Spirit, ye are not under the law.
I'm a completely different person now that I've found God, he's cleaning my heart every day. He's changing me daily and my conscience is stronger than ever. All of this is done through Christ, without him I would be dead in my sins. I've never felt peace like it. And I know that I am now born of the spirit and as I'm dying to the flesh daily i an becoming stronger in God. Without him, I am nothing.