The Metta Sutta is the Buddha's discourse on developing loving-kindness. It is a fundamental teaching in Buddhism & is chanted daily by many Theravadan monks and practitioners. It is the first of the Four immeasurables or heart practices -and it helps one overcome anger, ill will, hatred, & aversion. The Metta Sutta teaches specific means for developing the meditative practice of loving-kindness and is often recited before the meditation session. I find it most moving.