To dream that you are walking up a flight of stairs indicate that you are achieving a higher level of understanding. You are making progress into your spiritual, emotional or material journey. The dream is also analogous to material and thoughts that are coming to the surface.
To dream that you are walking down a flight of stairs represents your repressed thoughts. You are regressing back into your subconscious. It also refers to the setbacks that you are experiencing in your life. If you are afraid of going down the stairs, then it means that you are afraid to confront your repressed emotions and thoughts. Is there something from your past that you are not acknowledging?
To dream that you slip or trip on the stairs signify your lack of self confidence or conviction in the pursuit of some endeavor. If you slip going up the stairs, then it means that you are moving too fast toward attaining your goals. If you slip going down the stairs, then it suggests that you are moving too quickly in delving into your subconscious. You may not be quite ready to confront your subconscious or repressed thoughts.
To see spiral or winding stairs signify growth and/or rebirth.