Getting Comfortable with Discomfort
"The secret of success is learning how to use pain and pleasure instead of having pain and pleasure use you. If you do that, you're in control of your life. If you don't, life controls you." --Tony Robbins
There is an important difference between pain and discomfort. Physical pain is a warning signal your body uses to tell you to stop doing what you're doing, because it may cause damage or injury. Discomfort, well, discomfort is just a bit uncomfortable but it won't cause any permanent damage. In fact, temporary discomfort is an essential aspect of getting stronger and healthier.
The tricky part is being able to discern the difference.