"In happiness and suffering, in joy and grief, we should regard all creatures as we regard our own self."
Mahavira, 24th Tirthankara, Yoga-Sastra
"Killing a living being is killing one's own self; showing compassion to a living being is showing compassion to oneself. He who desires his own good, should avoid causing any harm to a living being."
Suman Suttam, verse 151
"Nothing which breathes, which exists, which lives, or which has essence or potential of life, should be destroyed or ruled over, or subjugated, or harmed, or denied of its essence or potential. In support of this Truth, I ask you a question -Is sorrow or pain desirable to you ? If you say yes it is;, it would be a lie. If you say, No, It is not; you will be expressing the truth. Just as sorrow or pain is not desirable to you, so it is to all which breath, exist, live or have any essence of life. To you and all, it is undesirable, and painful, and repugnant."