As you settle into your mats meet yourself where you are...right here...right now...in the "sukha" the sweetness of this moment. No need to strive or try to be something other than you are. You are already radiant, perfect and whole and loved eternally by all.
It is an easy thing to come to the mat full of expectations that moments later turn into harsh criticism. Next time you move on to your mat leave those things behind and just abide in your own True Nature...already perfect and whole.
Doing this on the mat helps us to recognize how often we move through our day setting up expectations for everything we do and then creating a hostile assault we wouldn't wish on our worst enemies if we don't meet those ideals.
How easy could your yoga asana be, how sweet could each moment of your life be, if you just met yourself in each moment full of love and acceptance just as you are?