Between the training and three attempts, Goggins did more than 67,000 pull-ups in nine months. But more than his physical endurance Goggins showcased the power of repetition. 

Four pull-ups an hour doesn’t seem like much. Over time, it becomes increasingly more challenging to the muscles, but increasingly more empowering to the mind.

Small numbers grow through consistent repetition. Small numbers are boring and don’t seem useful in the grand scheme. But small numbers are a necessary step before getting to the large numbers.

“You have to callus your mind to overcome your doubts and failures and keep moving forward.”  - David Goggins