According to spiritual teachings, what we tend to think of as “ourselves” or what we associate with ourselves— our name, gender, nationality, the personality that we project, the persona that we create, the number we see on the scale, the amount we see on our bank account etc— are also just costumes that we wear. They are the outer layers, but that isn’t who we really are. Who we truly are, what is unchanging and immortal, is a soul. Everything else is just a role, and when we attach too much to that role, we also end up hurting ourselves.
Observe your body and thoughts while you practice asana. If you can observe them, then it shows you that you are not the body or the thoughts. Furthermore, notice how you tend to act as though the body or the thoughts are all that you are. Notice the attachment towards projected accomplishments and the despair towards perceived failures. The storylines you create make it so that you believe you are these external things. Remember, these are costumes.
Om asato mā sad gamaya,tamaso mā jyotir gamaya,mṛtyor mā amṛtaṃ gamaya,Om shanti shanti shantih
Lead me from the unreal to the real, from darkness to light, from death to immortality. Om peace peace peace.