Born again
Jesus is probably just saying no one can have faith in Jesus unless they are born of the Spirit of God.
So rather than making this a mystical creation, this is saying just having faith in Jesus as the Son of God, who died to save you, is an indication of the Holy Spirit at work in your heart. He is raising up this work in His people to the supernatural, rather than making it a mystical experience, once done never lost.
The foundation of this salvation are the words of Christ himself. In the parable of the seed and the sower, it is the word of God that is the seed. Jesus backs this up
The Spirit gives life; the flesh counts for nothing. The words I have spoken to you—they are full of the Spirit and life.
John 6:63
The word in the heart brings life to the believer. Now the mystics discount Jesus's words, the life they bring, the commands He has given, the fruit they bear in the heart of the believer.
The mystics cry is not love in the heart matters, but miracles and prophecy, words of power, creative command authority.
Yet Jesus condemned those whose foundation was on this very thing and not doing the will of God, evil doers.
But they have no fear, because they believe the people from before are all legalists, and they are the power people of the latter rain, destined to bring the church to dominate the world. But strangely Christ warned there is no future in domination only in walking in love, showing the work Jesus has done in our hearts, turning the other cheek.
So I still stand amazed at how this argument continues even though we have clearly demonstrated God is only interested in people who can walk in righteousness, purity and love. Now if they agreed with this position I would no longer be opposed and told I need something more, but rather we would talk about how we can realise the victory the cross promises in our hearts.