Paul references the faith, a standard of truth upon which someone believes and adheres to in life, (Galatians 1:23).
Hebrews 11:1 teaches us about a personal faith, such as one’s convictions.
Paul also writes, “We walk by faith, not by sight,” (2 Co. 5:7).
We might think we live our life on the basis of personal convictions, yet Paul’s expression involves a body or standard of truth, i.e. “we walk by the faith…”
As a result, life is directed by something objective, not subjective to our feelings.
From this perspective, faith changes the nature of how we live and lead others.