Here's a powerful thought.
It's OK to be angry, and to be angry, or to get angry, does not diminish your rightoeusness or your right standing before God.
Jesus got angry:
"And when he had looked round about on them with anger, being grieved for the hardness of their hearts, he saith unto the man, Stretch forth thine hand. And he stretched it out: and his hand was restored whole as the other." (Mark 3:5)
This verse contains the one time where Jesus is described as angry. Not even when he was turning over the tables and chasing out the merchandise of animals in the Temple do we find a record of Jesus being angry. God gets angry when people put the law ahead of grace, when people are hard and reject grace.
Paul informs us that it is OK to get angry, too:
"Be ye angry, and sin not: let not the sun go down upon your wrath" (Ephesians 4:26)
Righteousness is a gift that we receive and keep receiving from the LORD (Romans 5:17). Because it is a gift, the reception of His righteousness into our lives does not depend on how we feel. We can be mad, sad, angry, enraged, full of wrath, full of sorrow, but every time we need to know that our righteousness is not removed from us.
This is a great revelation, and this revelation should grant great authority and opportunity to everyone who sees injustice and wants to do something about it.