If the dough rises, however, you can be sure there is living yeast in it. Risen dough is evidence that there is life in the yeast. James said something similar; “You see that a person is justified by works and not by faith alone.” (James 2:24, NASB 2020)

To have greater faith, or grow in faith, means coming to believe with greater certainty, and that, to me, is trust. That's why I say “trust gives legs to faith.” It is by growing in our knowledge of Him, His vastness, His character, that our temporal lives are transformed without striving in the flesh.