Seems to me Jesus Himself answered that question rather succinctly.
Then said they unto him, What shall we do, that we might work the works of God? Jesus answered and said unto them, This is the work of God, that ye believe on him whom he hath sent. John 6:28-29
So dead faith is OK with Jesus? That’s good to know.
Romans 1:17 For in it the righteousness of God is revealed from faith for faith, as it is written, The righteous shall live by faith.
Galatians 3:11 Now it is evident that no one is justified before God by the law, for The righteous shall live by faith.