You must purge yourself before finding faults in others. When you see a mistake in somebody else, try to find if you are making the same mistake. This is the way to take judgment and to turn it into improvement.
B.K.S. IyengarThrough surrender the aspirant's ego is effaced, and . . . grace . . . pours down upon him like a torrential rain.
B.K.S. IyengarOne day you too may experience what I have experienced. So right away go and practise.
B.K.S. Iyengar