Mauney claims he's no inherently tougher than anyone else. The difference, he says, is that he simply told himself he was tougher and then believed it. This cultivated self-belief became a reality, allowing him to push through extreme pain and injuries that would sideline others.

Arnold realized the formula he used to master bodybuilding—self-confidence, positive attitude, and hard work—was not sport-specific. He understood these principles were a universal framework he could apply to conquer any new field, like acting or business, long before he achieved that success.

Unlike instantly gratifying habits, effortful ones like exercise initially feel painful. This stress signals the body to upregulate its own feel-good neurotransmitters like dopamine in response. In effect, you are "paying for" your dopamine upfront with effort, leading to a delayed but sustainable reward.

Arnold identified that his physical performance fluctuated not because of his body, but his mind. He actively "trained" his mental state, using partners for motivation and recognizing that psychological strength was as crucial and trainable as physical strength.

Instead of seeking easier paths, intentionally take on difficult challenges ('hardcore mode'). This struggle forces adaptation and builds the strength needed to outperform others. Getting physically stronger in a gym is a tangible way to prove to your mind that this growth is possible in all areas of life.

Most pain during intense exertion isn't a direct measure of physiological damage, but the brain's predictive mechanism to prevent harm. You can manage this by resetting the brain's expectations with small sensory changes, like how runner Elliot Kipchoge smiles when he's hurting to trick his brain into feeling okay.

Training multiple times a day for hours wasn't just about physical results for Arnold. It was a deliberate strategy to build a psychological edge. Knowing he was outworking everyone else gave him an unshakable belief that he deserved to win.

By tracking even fractional changes in his body measurements and studying progress photos with a magnifying glass, Arnold created a powerful incentive system. Seeing tangible, albeit tiny, progress provided the constant positive feedback needed to sustain his extreme efforts.

Early in his career, Arnold would mentally rank himself below his opponents before competing, effectively guaranteeing a loss. He identified this self-defeating mindset as a primary obstacle, which he later corrected by developing an unshakeable belief in his own victory.