First, 1 Thess 1:3 shows that faith is a work, "work of faith" - "ergon pistis" is literally work faith. A working faith saves and "faith only" is not a working faith for faith only is void of works. So how can a faith empty of works produce works? Can an empty water bottle produce water? It's impossible.
Mk 2:5 says Jesus "saw their faith". What was it that Jesus saw that is called faith? The work those men did. Jesus saw the work these men did in removing the roof and lowering the sick man down to Him and their work is here is called faith.
Secondly, James already made the point that a living, viable faith has works. A faith that has no works is dead therefore "faith alone" is dead for it is void of works. So again, how does a dead faith only ever produce works when it is DEAD?
Lastly, Rom 10:9,10 proves my point. Paul said one has to both believe unto righteousness and confess with the mouth unto salvation. Both belief, Jn 6:27ff and confessing with the mouth are works, they are something done. And these two works are "UNTO salvation" not "because of salvation", so Rom 10:9,10 puts works before salvation.
Yes, it would appear that Jesus saw their faith by their determination to get the paralyzed man into the house where Jesus was. It could also appear that Jesus perceived their faith, as He was so ably capable of doing. In either case, their faith, which they already had, produced results. However, there is not use of the word ergon in this verse or the previous verse.
Again, James does NOT talk about faith as regards salvation...he talks about faith as regards LIVING in Christ. Here he clearly states that saying you believe in Christ and His message, but not producing fruit, clearly shows your faith is dead. It may have been alive when you accepted Christ, but it is no longer.
Again, in context, Romans 10:9-10; are predicated on Romans 10:8, where Paul starts by saying; But what does it say? “The word is near you; it is in your mouth and in your heart,†that is, the message concerning faith that we proclaim:
You would have us believe that faith is a work, and that what Paul says in Eph 2:8-9 is not correct. For it is by grace you have been saved, through faith —and this is not from yourselves, it is the gift of God— 9 not by works, so that no one can boast.