Overcoming Mental and Physical Limits with the 40% Rule

Using negative comments as fuel, the speaker developed the 40% rule from his experiences during heart surgeries and a 100-mile run. The 40% rule suggests pushing past the mental governor that limits us when we feel pain or discomfort, gradually increasing effort to reach nearer to 100% potential. The speaker emphasizes that very few people ever truly reach 100% of their capacity, highlighting the importance of pushing past perceived limits and continuously striving for higher goals.