Shakyamuni entered the [sacred-fire room of Uruvilva-Kashyapa] and sat in meditation. Surely enough, the malevolent snake came out and tried several times to attack him. But because he had a great heart of compassion for all sentient beings and felt no animosity toward the snake, Shakyamuni subdued it with benevolence and love. Entering the state of meditation known as the heart of benevolence, he calmed the fierce serpent, reduced it to a small, harmless creature, and went calmly on with his meditation throughout a peaceful night. …

Though it is a slight digression, I should like to offer a few words of explanation about the heart of benevolence, the state of concentration in meditation that Shakyamuni used to subdue the fierce serpent in the sacred-fire room of Uruvilva-Kashyapa. This state, which can be attained by anyone, refers to the benevolence that is one of the four infinite virtues–benevolence, compassion, giving happiness, and impartiality–and means constant compassion and kindness for all beings, not just for those that are dear but also for unrelated beings and even enemies against whom one might otherwise entertain bitterness.

According to Buddhist classics, eleven categories of merit attach to the practicing of the heart of benevolence. These categories are: peaceful sleep; peaceful awakening; no bad dreams; constantly clear, bright facial complexion; love from other people; love from nonhuman beings; protection of the gods; imperviousness to fire, wounds from blades, and poison; free entry into the concentration stage of meditation; at death, freedom from confusion (death comes as easily as sleep); after death, even if enlightenment has not been attained, at least the privilege of rebirth in a happy state of the Brahma heaven. (Page 64)