I imagine that Eve talked Adam into eating. She was convinced they were being held back by God, and the fruit offered a better life for them both. If only her dumb husband would quite being duped through his silly blind devotion to everything God told him as true. Adam knew better, but started to believe the woman, even because he felt diminished in her eyes in that he wouldn't stand up for himself, have courage, and be a man.Explain to me again please what you mean by Adam doubting himself.
He therefore lacked the confidence in himself that he needed to stand up to the woman, despite what she was going to think of of him. Eve's voice was Satan's lie in her. Matthew 16:23.