God is the one who changes a person's life through the born-again experience. You can
witness, preach, and teach the Gospel to the best of your ability, but only God can convert
a soul. Once you understand this, much of your worry about evangelizing is relieved.
You are simply the messenger, a human instrument for the divine workman. It is
impossible for you to convert someone. The born-again experience is conceived and
birthed by God. When a person is born again, he is "begotten of God":
Whosoever believeth that Jesus is the Christ is born of God; and every one
that loveth Him that begat loveth him also that is begotten of Him.
(I John 5:1)
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Born again experience? I would reply that most people don't have that experience, but after accepting Christ are transformed, over time, into a figure that more closely resembles Christ.