“There are two things that must be rooted out in human beings – arrogant opinion and mistrust. Arrogant opinion expects that there is nothing further needed, and mistrust assumes that under the torrent of circumstance there can be no happiness.” Epictetus, Discourses.
What lies behind the closed door? What lies behind the number on that door? Whatever thoughts you have – whether they are about threats or opportunities – your perceptions are all yours. Make of them as you will, but beware of the extremes your mind can take you to.
What is opportunity without threat? What is good without bad? Finding the middle ground in every spectrum requires seeing both ends and accepting them for what they are: similar in nature but different in degree.