When considering the idea that life is sacred, the word 'life' can not be relegated to mean only one particular form of life .. ie human. .. it must be all-encompassing.
Accidents may occur and life and death still shall follow .. however ..
Human is an empathic, intelligent and reasoning creature. If it can deduce that its own life (as well as the lives of its family, friends and community) is sacred; human shall also discover the importance and value of all life surrounding it.
If you would never harm a living human being, then you must also question the notion of hurting a fly.
To love life is to love all forms of life .. and to respect and cherish all forms of nature where life exists.