When one is within comfort zone, one would think of better opportunity.

When one has gotten better opportunity, one would sometimes face fear in the face, and start wondering about familiarity.

For sure, familiarity is never good a good choice. But when faced with fear as one's mind starts getting bored, one would just irrationally think about familiarity

Got to get the mind busy before one starts thinking about stupid things, which might lead to actions, which becomes too often that it becomes a habit.