What does the author claim happens to one's spiritual progress if they lack Shraddha and Saburi?

The author makes a very clear and firm statement regarding the consequence of lacking faith (Shraddha) and patience (Saburi). As recorded in chapter 2, he explicitly states that 'Without faith (Shraddha) and patience (Saburi), Not a bit of the spiritual goal is achieved.' He presents this not as an opinion but as a scriptural truth that he also experienced directly. This lesson, along with the need to avoid debating, was a critical realization that he accepted with a pure nature to further his spiritual journey.