Yoga is much more than a physical practice. It is also a philosophy about the way we should live. According to yogic philosophy, we cause ourselves pain by desiring things we don’t have, but think that we need. In other words, we hurt ourselves by yearning after what’s out of reach.
Santosa is a niyama, or guiding principle of yoga. This principle encourages us to develop contentment. It prescribes the merit of striving to be grateful for what we have rather than yearning for new and different things. The word “santosa” is also sometimes translated as happiness, because, by finding contentment with what we have, we also find joy, relaxation, and peace.
You can practice santosa in all aspects of your life-toward your family, friends, and your career. – Yoga Journal.com