Niyamas
the attitudes we adopt toward ourselves
Saucha
Cleanliness. Śauca has both an inner and an outer aspect.Outer cleanliness simply means keeping ourselves clean. Inner cleanliness has as much to do with the healthy, free functioning of our bodily organs as with the clarity of our mind. Practicing āsanas or prāṇāyāma are essential means for attending to this inner śauca
Santosha
Modesty and the feeling of being content with what we have. Often we hope for a particular result to ensue from our actions, and we are just as often disappointed. But there is no need to despair—rather, we should accept what has happened. That is the real meaning of saṃtośa—to accept what happens Saṃtośa encompasses our mental activities such as study, our physical efforts, and even how we earn our living. It is about ourselves—what we have and how we feel about what God has given us.
Tapas
Tapas refers to the activity of keeping the body fit. Literally it means to heat the body and, by so doing, to cleanse it. Behind the notion of tapas lies the idea that we can get rid of the rubbish in our body“Another form of tapas is paying attention to what we eat. Eating when we are not hungry is the opposite of tapas. Attention to body posture, attention to eating habits, attention to breathing patterns—these are all tapas that help to prevent the buildup of rubbish in the body, including excess weight and shortness of breath. Tapas makes the whole body fit and well functioning