Non-violence and kindness to living beings is kindness to oneself.
A living body is not merely an integration of limbs and flesh but it is the abode of the soul which potentially has perfect perception, perfect knowledge, perfect power, and perfect bliss.
All breathing, existing, living, sentient creatures should not be slain, nor treated with violence, nor abused, nor tormented, nor driven away.
Attachment and aversion are the root cause of karma, and karma originates from infatuation. Karma is the root cause of birth and death, and these are said to be the source of misery. None can escape the effect of their own past karma.
Desistance from sin makes one entirely happy.
Do not injure, abuse, oppress, enslave, insult, torment, torture, or kill any creature or living being.
If you want to cultivate a habit, do it without any reservation, till it is firmly established. Until it is so confirmed, until it becomes a part of your character, let there be no exception, no relaxation of effort.
Kill not, cause no pain. Non-violence is the greatest religion.