Ephesians 4:26-27 (26)  Be angry and do not sin; do not let the sun go down on your anger,  (27)  and give no opportunity to the devil.  

Paul Tripp:  One of the necessary components of our broken world is anger.  Because if this world is broken, if it not the way it’s supposed to be, then it’s right at points to be motivated by anger.  Anger isn’t just a bad thing; Anger is also a very good thing, and we better know the difference.  God’s grace is not supposed to make us un-angry. God’s grace is supposed to make us good and angry, at the same time. 

CS Lewis To love at all is to be vulnerable. Love anything and your heart will be wrung and possibly broken. If you want to make sure of keeping it intact you must give it to no one, not even an animal. Wrap it carefully round with hobbies and little luxuries; avoid all entanglements. Lock it up safe in the casket or coffin of your selfishness. But in that casket, safe, dark, motionless, airless, it will change. It will not be broken; it will become unbreakable, impenetrable, irredeemable. To love is to be vulnerable.

Peter Jeffery (Bite-size theology)  God’s Wrath:  God’s wrath is his anger against those who sin and his determination to punish them.  It is divine holiness stirred into action against violations of his holy law.  God, who is utterly and completely holy, cannot regard evil and good at the same time.  He cannot smile benevolently upon both truth and lies.  So God’s holiness makes hell as inevitable as his love makes heaven.  God never excuses sin.  This is actually proved beyond all doubt by the cross of Jesus.  One the cross sin is punished and borne by our substitute, the Lord Jesus Christ.  No sin is excusable, but, thank God, it is pardonable in Christ. God’s wrath is as read as his love, but it is not like human wrath.  It is not vindictive, capricious or irrational.  It is a right and necessary reaction against moral evil.  It is judicial wrath against guilty sinners.  God is only angry when anger is called for.