In the West, we tend to view thoughts on their own terms rather than as symptoms and reflections of the state of our body. Literary characters like Othello, George Costanza, Josef K., and Marie Weltstern, allowed a thought of doubt to become their realities. In the Torah, we see how characters like Jacob and Joseph naturally overcome doubt through cultivation of a strong inner core and a robust physical and mental health. It is not enough to tell a person to be more reasonable; you must get them to feel more reasonable.