'Anger is a crucial human emotion. It can be that which eradicates oppression, fuels social change, or rails against hypocrisy. Anger at the ill-treatment of others has led to the repeal of slavery, and the outlawing of exploitative child labour. There is much anger in the Psalms where the writers cry against injustice and shout about the way evil-doers seem to prosper. There is anger in the Gospels when Jesus sees that the place where God is to be worshipped has been turned into a "den of thieves". In its right place anger is essential.'
Elaine Storkey, The Search for Intimacy, p.218.