Matthew 6:22 The light of the body is the eye: if therefore thine eye be single, thy whole body shall be full of light.
23 But if thine eye be evil, thy whole body shall be full of darkness. If therefore the light that is in thee be darkness, how great is that darkness!
Proverbs 23:7 For as he thinketh in his heart, so is he: Eat and drink, saith he to thee; but his heart is not with thee.
God speaks quite a bit about anger in the Bible.
Proverbs 22:24 Make no friendship with an angry man; and with a furious man thou shalt not go:
Lest thou learn his ways, and get a snare to thy soul.
So then why would we listen to their music? God's anger is always righteous and we can trust Him, but we humans need rules.
Ephesians 4:26 Be ye angry, and sin not: let not the sun go down upon your wrath: 27 Neither give place to the devil.
King Saul was an angry man.
1 Samuel 20:30 Then Saul's anger was kindled against Jonathan, and he said unto him, Thou son of the perverse rebellious woman, do not I know that thou hast chosen the son of Jesse to thine own confusion, and unto the confusion of thy mother's nakedness?
1 Samuel 18:8 And Saul was very wroth, and the saying displeased him; and he said, They have ascribed unto David ten thousands, and to me they have ascribed but thousands: and what can he have more but the kingdom?
Love is not easily angered.
1 Corinthians 13:4 Charity suffereth long, and is kind; charity envieth not; charity vaunteth not itself, is not puffed up, 5 Doth not behave itself unseemly, seeketh not her own, is not easily provoked, thinketh no evil; 6 Rejoiceth not in iniquity, but rejoiceth in the truth; 7 Beareth all things, believeth all things, hopeth all things, endureth all things.
Proverbs 16:32 He that is slow to anger is better than the mighty; and he that ruleth his spirit than he that taketh a city.
There of course is a time and place for righteous anger, but it's not an emotion we want to wallow in.

