Do not allow yourself to be worried or upset by small things. Look at things from an inner point of view and try to get the benefit of all that happens. If you make a mistake, don’t get distressed because you made a mistake—rather profit by it to see the reason so as to get the right movement in future. This you can do only if you look at it quietly from the inner being without sorrow or disturbance.
Ref : Letters on Yoga Vol. III