Nice post as always sir. Failure I think is finding out ways by which a thing can not be done, like you rightfully said, it depends on how you interpret it. Also I'd like to add that, sometimes you don't need to fail to learn, you can learn from the mistakes of others, just like a friend said "in the classroom of experience, stand outside and watch" to a point I feel some of the things we fail over could have been avoided if we learnt from the mistakes of others.