Negative thinking is a common cause/symptom of depression. When you feel a little down you tend to see things in http://ge.tt/4w5BpOI2/v/0 a negative way. The truth is that negative thinking is a powerful force. One simple way of changing your thinking is by replacing the negative thoughts with positive thoughts in order to change your mentality.
http://psychcentral.com/lib/psychodynamic-therapy/
