《吕氏春秋·论·开春论》
对其他物类仁爱，对人却不仁爱，不能算是仁，对其他物类不仁爱，只是对人仁爱，仍然算是仁。
五曰：仁于他物，不仁于人，不得为仁。不仁于他物，独仁于人，犹若为仁。
To be benevolent to other species but not to human beings is not to be benevolent, and to be benevolent to other species but not to human beings is still to be benevolent.