God prepares the soil, not the human.
And that's God's grace in salvation.
No soil can ever realize it's own potential.
No matter how hard it tries.
The potential of the soil, however, is an element of salvation that belongs to the soil itself.
God does not purposely give some people this potential, and no potential to others.
You are what you are by virtue of who you are, and this life is where God realizes the potential for growth in whom that potential exists.
Man's salvation isn't due to choice, that is a false gospel.
It's his choice insofar as what potential he has for the word of God to be retained and grow in his heart.
That potential is something that belongs to the individual himself.
The grace of God is He will realize that potential you have that you can't realize yourself.
That's why all the glory goes to Him.