Having the second birth, being born into Gods family as spoken of in John 3, as the Spirit of God puts spiritual life into my dead Spirit is not the same as having the Spirit of God come and live in the same tent of flesh, (my physical body) that my now living Spirit does.

Both our spirit coming alive and recieving the Spirit of God to live in us are essential prerequisites to living in an intimate relationship with our Father in Heaven which is the key that unlocks the power to do His will.