The doctrine of God first does all the preparing of the ground of our soul, before He will ever plant the seed, so that we will automatically be saved, when we hear His Word, is false.
1. By the parable of the sower, we know that whensoever we hear the Word and Jesus, that His seed is sown in the heart, and it is done so by grace.
2. Scripture does not speak of repeated sowing, until the ground is properly prepared by God. The seed is sown once and for all, and the ground we have, adn what we do with it, will determine the result, whether unto salvation or perdition.
3. We are to prepare our hearts. We do the watering and the tilling of the ground, and if we prepare our hearts, then God is faithful to save us and give the increase by grace.
The voice of him that crieth in the wilderness, Prepare ye the way of the LORD, make straight in the desert a highway for our God. (Is 40)
4. And so we are also to keep ourselves prepared unto the Lord, to keep our ground good for increase of God, to keep ourselves from sin of the devil, that our souls be not destroyed, and the ground bringing up only thorns and briers for burning:
If a man therefore purge himself from these, he shall be a vessel unto honour, sanctified, and meet for the master's use, and prepared unto every good work. (2 Tim 2)
The lord of that servant will come in a day when he looketh not for him, and at an hour when he is not aware, and will cut him in sunder, and will appoint him his portion with the unbelievers. And that servant, which knew his lord's will, and prepared not himself, neither did according to his will, shall be beaten with many stripes. (Luke 12)
5. And even if we do turn away for a season, we can yet still return to the Lord, and prepare our hearts to renew faith again:
If ye do return unto the LORD with all your hearts, then put away the strange gods and Ashtaroth from among you, and prepare your hearts unto the LORD, and serve him only. (1 Sam 7)
6. But if we continue in sin wilfully and openly without shame, crucifying the Son of God afresh before all, then there can be no return, and it is impossible to renew repentance again. (Heb 6)
So, we believe His Word, pray in faith, turn from wicked works, confess sin to be forgiven if we sin, and do good by faith, whensoever it is at hand to do so, and fulfill the royal law of loving our neighbor as ourselves.
Against such, there is no law, nor can the devil touch us: if we do so.