2Co 4:3-6 KJV But if our gospel be hid, it is hid to them that are lost: (4) In whom the god of this world hath blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them. (5) For we preach not ourselves, but Christ Jesus the Lord; and ourselves your servants for Jesus' sake. (6) For God, who commanded the light to shine out of darkness, hath shined in our hearts, to give the light of the knowledge of the glory of God in the face of Jesus Christ.
All of this is stated after the 3rd chapter that says the veil is removed when our hearts turn to Christ.
The devil blinded the woman's MIND, with the KNOWLEDGE (a mind-thing) of good and evil.
We need knowledge of the glory of God!
Eph 1:17-19 KJV That the God of our Lord Jesus Christ, the Father of glory, may give unto you the spirit of wisdom and revelation in the knowledge of him: (18) The eyes of your understanding being enlightened; that ye may know what is the hope of his calling, and what the riches of the glory of his inheritance in the saints, (19) And what is the exceeding greatness of his power to us-ward who believe, according to the working of his mighty power,
HIS POWER is stressed as opposed to OUR power in making ourselves righteous.
And it's a REVELATION -- unveiling -- in knowledge of HIM -- TREE OF LIFE is the knowledge of CHRIST, while the forbidden tree is knowledge of good and evil.