Considering This
John Piper:
Consider the word “this” in Ephesians 2:8. Does it refer to “faith” or “grace” or both? Is faith a gift of God?
Read A Whole World Hangs on a Word.
Questioning Work
Matthew Barrett answers this question (The Gospel Coalition):
Why is faith not a work? If we are obligated to have faith before righteousness can be credited to us (Romans 4), how is faith not a work?
Surprisingly, some commenters are arguing that faith is a work.