There are two kinds of sentient beings. They come and face the Bodhisattva, and the first one makes reverence and offers offerings to them, while the second one insults them with hatred and insults. At that time, the Bodhisattva will endure with all his heart, and will not love the sentient beings who are respectful and nurturing, nor will he hate the sentient beings who have done harm.
Nagarjuna India (Treatise on the Great Perfection of Wisdom 14.24)