The Niyamas are like the 5 commandments of self discipline. These are practices that you focus on to create a better life for yourself and those around you – such as meditation. These are self-care practices and affect how you show up in the world
The first is saucha which means purity.
Purity is to do with your physical body in this case – taking care of it, but not obsessing about it and letting it define your existence.