Selflessness and perform selfless service is the main part of yoga practice. It’s about performing action without egoism. There is no ego or ‘I’, and hence, there’s no attachment or identification with the actions and the fruit of actions. Selflessness and selfless service is not about self-sacrifice. It’s not about sacrifice ‘myself’ to put other beings before ‘I’. They are two different things.
One can be performing many actions including yoga practice, rituals and self-sacrificed actions, but one isn’t practicing yoga if one doesn’t know what is performing action without egoism.
Be free from the idea of ‘I’ sacrifice ‘myself’ to put other beings and their benefits in front of ‘I’ and ‘my benefits’. But there’s no ‘I’ or ‘my benefits’ to be sacrificed for other beings. There’s no separation. There’s no this being and other beings. Be kind to others is being kind to oneself, and be kind to oneself is being kind to others.
There’s no sacrifice.