Believing is because of grace, so you put the cart before the horse Acts 18:27
27 And when he was disposed to pass into Achaia, the brethren wrote, exhorting the disciples to receive him: who, when he was come, helped them much which had
believed through grace:
The word through, the prep dia means:
- through
- the ground or reason by which something is or is not done
- by reason of
- on account of
- because of for this reason
- therefore
- on this account
One cannot believe except its caused by grace, the grace of the Spirits regeneration. The lost unregenerate man or person doesnt have salvation faith, he is dead spiritually and in the flesh, and they which are in the flesh cannot please God, Period Rom 8:8
8 So then
they that are in the flesh cannot please God.