Atzmus is a Hebrew language term that means "deed." It's a way of thinking about how we approach things, and it's a principle of Jewish religious life. It means that if we want to be successful in our lives, our actions need to reflect who we are and what we stand for, and that our actions need to be done with intention and thought. For example, let's say you want to practice better eating habits. To live by the atzmus principle, you would take the time to sit down and plan out your meals for the week, purchase healthy ingredients and cook them with intention. By taking the time to think through and plan out your meals, you are demonstrating that you are taking your health seriously and putting in the effort needed so that you may have a healthier lifestyle.