What this quote means

Robert Mitchum states three life rules with a cynical humor. They mix caution (don't smoke in bed, don't carry a knife) and relational common sense (avoid people more unstable than yourself). The last rule, tinged with irony, underscores the importance of choosing companions wisely. It's a lesson in pragmatic wisdom, wrapped in dark humor.

How to apply it daily

Today, evaluate your relationships: do you spend time with people who bring you stability? If not, set a healthy boundary with someone who drains you.