Pikuach nefesh

Pikuach nefesh (Hebrew: פיקוח נפש), which means "saving a soul" or "saving a life," is the principle in Halakha (Jewish law) that the preservation of human life overrides virtually any other religious rule of Judaism. In the event that a person is in critical danger, most mitzvot, including the Ten Commandments of the Torah, become inapplicable if they would hinder the ability to save oneself or someone else. However, there are certain exceptions; some rules and commandments may not be broken under any circumstances and thus may require an act of self-sacrifice.