"Rescuing, saving grace is the only Cause necessary to produce faith"FTFY!
False. Grace is definitely not the necessary cause to produce faith.
Nor is grace the currency by which sin debt is paid.
Nor is grace the substitutionary element whereby justice is served.
Not a very artful dodge BTW.
[Rom 4:16 KJV]
Therefore [it is] of faith, that [it might be] by grace; to the end the promise might be sure to all the seed; not to that only which is of the law, but to that also which is of the faith of Abraham; who is the father of us all,