Like sitting in a pew without glue or screws. Eventually it ll come apart. Faith is trusting, relying on someone or something. Which implies moving beyond agreement to action. Think for a moment about how that shows itself in the Scriptures.
Faith is related to action, to living, to being and doing.
Faith is FAR more than just knowing. And that s why the whole of chapter 11, after this rich and almost explosive beginning, digs right into a long recitation of one account after another. They way they lived and acted. That s faith. If it were, most of the saints in Hebrews 11 would have been abject failures.