They live by compassion and sympathetic joy
and in a constant state of equanimity towards cyclic existence.
By thus training in concentration, they reach enlightenment.
Having realized peace free of sorrow, awakening,
one sees the illness, ageing, and anguish of sentient beings.
Compassion for beings then dawns within
and the ultimate teaching is imparted.
―Buddha Shakyamuni, King of Samadhi Sutra