I had a very easy time following this rule until my houseplants were attacked by spider mites and almost simultaneously my rats attacked by a different species of mites. How does one watch the beings (I don't apply "being" to the plants but do to my rats) they love be drained of their vitality by other beings and refuse to intervene? Is it right?
My wife, who is not a Buddhist, intervened, and both rats and plants survived but this experience deeply shook me. One might say I am experiencing a crisis of faith.