I found the excerpt below via the always insightful Farnam Street Blog.
“When we encounter pain, we are at an important juncture in our decision-making process.”
It is a fundamental law of nature that to evolve one has to push one’s limits, which is painful, in order to gain strength—whether it’s in the form of lifting weights, facing problems head-on, or in any other way. Nature gave us pain as a messaging device to tell us that we are approaching, or that we have exceeded, our limits in some way. At the same time, nature made the process of getting stronger require us to push our limits. Gaining strength is the adaptation process of the body and the mind to encountering one’s limits, which is painful. In other words, both pain and strength typically result from encountering one’s barriers. When we encounter pain, we are at an important juncture in our decision-making process.
Most people react to pain badly. They have “fight or flight” reactions to it: they either strike out at whatever brought them the pain or they try to run away from it. As a result, they don’t learn to find ways around their barriers, so they encounter them over and over again and make little or no progress toward what they want.— Ray Dalio