When you think you are right, often you think others are wrong. Then you feel angry. If you feel the others are right, often you think you are wrong. Then you feel guilty, sad and miserable. In both cases, you lose balance.
The mind vacillates between this duality (of being right or wrong). To get out of this duality is the whole purpose of life; that is called moksha. Moksha means to rise above this duality.

Sri Sri Ravi Shankar