Anger is a natural outpouring if the unregenerate man. Here in Psalm 4 David begins by with a prayer, begging God to deal with his enemies v.1-3. When we get to v.4 David instructs his enemies to turn (repent) from their anger Be angry,2 and do not sin; (ESV); turning to God v.5. David concludes v.6-8 by praises and expressing his trust in God.
In the New Testament Paul writes to the church at Ephesus the about the same subject Ephesians 4:26-31, making it clear that righteous anger (we should be angry with abortions, LBGT, Suppression of Christianity, ETC.) yet in our anger we must; do no sin; do not let your anger [cause you shame, nor allow it to] last until the sun goes down. In other words our anger must be biblically based. Does the object of our anger go against the expressed word of God?
Oh there will be occasions when the neighbor blasts their music to load, or has a messy yard or some other such thing that will upset you. Maybe you come home after a long hard day at work and the washer overflows. Reasons to be upset maybe reasons to lash out (anger must be biblically based) not at all.
Yet in the end our human nature may take over and Anger would seem to be unavoidable. It is how we act in our anger that makes all the difference. Will people, (family, feinds, co-workers) see us as just another fake Christian or will they see us a a reflection of the Light of Christ?