Your values may be challenged when confronted with a high stress situation.  In the heat of the moment is important to make good choices. Regarding integrity: “You can’t buy it or sell it, when supported by education, a person’s integrity can give him something to rely on when his perspectives seem to blur, when rules and principles seem to waver, and when he is faced with hard choices of right and wrong; it is something to keep him on the right track, something to keep him afloat when he is drowning.” Comment from James Stockdale (1923-2005), prisoner during the Vietnam war, who further recommends to carefully go through a moral inventory, so when confronted with stressful situations: you do not waver with decision making, you already know what you believe is right or wrong. (Excerpt for Southwick, 2007).