With everything we do there's a mental pressure because of the intensity of the program. If you want different results then you do things differently. Albert Einstein once said, "Insanity is doing the same thing over and over and expecting different results."
So our thinking is challenged. Our ways are tested. Our will is put on the altar. We're put into the Refiner's fire and come out with clearer thinking and truer ways. We're becoming those who go against the grain and allow our lives to be excruciatingly examined.
We push ourselves and each other past our assumed limits.
There's this invisible wall you crash through when you exceed what you thought was your stopping point. It's hard and every part of you says it's okay to quit, but when you keep going, you realize nothing is impossible. Taking one more step, then one more, and before you know it you've gone a mile past your "limit". It may not be a mile right away, but you will get there if you don't give up.
We become individuals who won't quit even in the face of adversity.