peace to you!
Regarding James 4:8... I offer you Isaiah 55:3 and 6. Why? Because James' letter was to the 12 tribes, yes? And LONG before James wrote what he did, our Father had Isaiah write what HE did:
"Incline your ear"... not "I will incline your ears for you"...
"Come to me"... not "I will include your ears toward me and then make you come to me..."
"Listen (first!)... AND your soul will keep alive... AND I shall readily conclude with you people an indefinitely lasting covenant"... not "I shall keep your soul alive and conclude a covenant with me to make you listen..."
"SEARCH for JAH... you people... WHILE He may be found. Call to HIM... while He proves to be near."
"Let HIM... return to JAH... who will have mercy upon him"... not "I will make you return to me..."
Regarding "responding in faith," I refer you to the man who said, "I HAVE faith. Help me out where I NEED faith."
This man, on his own... had faith. How do we know? Because my Lord would have corrected him had he misspoken. But he did have some faith... just not ENOUGH faith, so that he ASKED... for MORE. Even the disciples asked for... and received... faith... a "gift" of the spirit.
Apparently, this man's faith, however, was less than a "mustard seed." And what he NEEDED may not have been even that much (a mustard seed)... for with THAT much... he could have transplanted a mountain. But... he KNEW he was LACKING... so he admitted it... and asked for what he lacked... ENOUGH faith. And I have no reason to believe that he didn't receive what he asked for: enough faith, so that his son lived.
Again, the greatest of love and peace to you, dear LT.
YOUR servant and a slave of Christ,