Yogini Riddle: Who Am I??

Who Am I?

As good as my plank was then,

it is better today.

If you tell me my hair is still straight,

I’ll just say okay.

A yogini I am, inside & out,

the main difference now

is that I no longer pout.

Back then and now,

I always knew how,

To do namaskar to you, I shall always be true…

Who Am I?