You cannot feel the total joy until you feel all emotions. We have a tremendous fear of losing control. Anger is a sin when it is inappropriately expressed and when it is stuffed and Satan knows this and uses anger to destroy. Anger kept in the body is toxic and people who suppress anger are at risk as much as people who smoke. If we do it comes out as rage and rage has destroyed many a marriage and many have killed through rage.
Rage is anger uncontrolled and stuffed.
The body holds the stuffed anger for many years. As children we used our minds to freeze our feelings and rationalize away the wrongs our parents did us. The second escape is spiritual. We pray the anger away. Prayer is not meant to be used to push the anger down into our body, which is what happens.