From The Maagid 248 The praises of King David (in psalms) all reflect a single goal which is called in Kabbalah sweetening anger – by singing the praises of G-d, he arouses the Divine love (this is similar in a male / female relationship- you see anger is based (99%) on jealousy and jealousy masquerades as seeking justice – but the source of jealousy is actually feeling that something is unfair – and the source of feeling something is unfair is not seeking what is just, but rather feeling that “why should you be happy while I am suffering” – so by giving one’s wife happiness in security, in intimacy, therefore one removes the fundamental jealousy)