The U.S. Navy SEALs offer crucial lessons on resilience and overcoming adversity, as shown by their intense training program, Basic Underwater Demolition/SEAL (BUD/S). This rigorous process is detailed in the book “Uncommon Grit” by Darren McBurnett, a 24-year SEAL veteran, who both endured and documented the first four weeks of the training, illustrating how resilience is forged.
  

Key Points: 

1. The SEAL training highlights the importance of confronting discomfort and not making excuses. Most trainees quit when faced with physical discomfort, but those who persist experience the job’s more rewarding aspects.
2. A key part of the training is about breaking perceived limits. Additional hardship is imposed to show trainees that they have more endurance than they initially believe.
3. According to McBurnett, the toughest part of the training is not physical but a “mental war.” The real test of grit is a trainee’s mental fortitude and determination.
4. Teamwork plays a critical role in SEAL training. Success and failure are collective, and pushing through pain for the team’s sake is a major aspect of the process.

Source: https://www.mensjournal.com/health-fitness/what-you-can-learn-from-navy-seals-about-grit-and-mental-toughness