I'm not suggesting that man isn't alive naturally and doesn't have use of his faculties. Neither am I suggesting that the Christian life is not an interactive relationship between Christ and the believer. But fallen man is at enmity with God, walks contrary to His ways, and finds the gospel to be foolishness. In addition, Jesus says of the Christian that apart from Him they can do nothing. So I find it a fair question to ask how does one go from their fallen estate to a saved estate apart from Christ. What happens in and to an individual that the gospel that was once anathema is now good news? Did they just wake up one day and change all that was formerly true of them? Is that possible?
Does not add up to cannot believe, it it did God would not ask us to do it.
Easy Peasy.