Loyalty is very important when things get a little tough, as they often do when the challenge is great. Loyalty is a powerful force in producing one's individual best and more so in producing a team's best.
Others may have more ability than you, they may be larger, faster, quicker, better jumpers ... but no one should be your superior in respect to team spirit, loyalty, enthusiasm, cooperation, determination, industriousness, fight effort, and character.
No building is better than its structural foundation, and no man (woman) is better than his (her) mental foundation. When I prepared my original Success Pyramid years ago, I put industriousness and enthusiasm as the two cornerstones with LOYALTY right in the middle of the pyramid - Loyalty to yourself and to all those dependent upon you.
We can become great in the eyes of others, but we'll never become successful when we compromise our character and show disloyalty toward friends or teammates. The reverse is also true: No individual or team will become great without loyalty.
Loyalty is a cohesive force that forges individuals into a team.