Thou Shall Not Kill What?

In this day and age, what earthly use are principles? Take No. 1: 'Thou shalt not kill'. To kill presumably means to deprive something of life. That includes not only humans, animals, and jelly fish but plants and bacteria. So, to slick to this principle one must never cat any animal, plant or jelly fish. One must not use soap, disinfectant or any kind of antibiotic — and of course, never use flyspray, or rat poison. So one lives in considerable discomfort. So where does everyone draw the line? Presumably at killing humans. Why is a human being worth anything more than a blade of grass? Isn't it easier to discard this principle, and prefer to think in terms of convenience for those living a full life now, where an unborn child's life is perhaps worth as little as a blade of grass? Even though it is extremely abhorrent to sterilise, the concept of abortion is perhaps necessary, to allow life to function adequately as it is now, in society.

An Unprincipled Heathen