Discipline and success come from relentless effort and grinding in solitude, not just when it's convenient or visible to others. Spoken by David Goggins, Andy Frisella, Chadd Wright, Tim Grover, Eric Thomas. You can see more of David Goggins at instagram.com/davidgoggins, Andy Frisella at instagram.com/andyfrisella, Chadd Wright at instagram.com/chadwright278, Tim Grover at instagram.com/attackathletics, Eric Thomas at instagram.com/etthehiphoppreacher. The music is Requiem for a Dream by Clint Mansell. You can see more of Clint Mansell at twitter.com/iamclintmansell.