11 Benefits of Rest:

1. Improves Memory
2. Lengthens your lifespan
3. Prevents/Helps inflammations
4. Boosts your creative juices
5. Improves athletic performance
6. Improves academic performance
7. Makes you more alert and attentive
8. Helps in maintaining/obtaining a healthy weight
9. Reduces Stress
10. Prevents accidents from happening
11. Prevents depression

These are only a few of the many benefits of being well rested. 

Sr White writes:

"Sleep, nature’s sweet restorer, invigorates the weary body and prepares it for the next day’s duties." CH 147.2

"The importance of regularity in the time for eating and sleeping should not be overlooked. Since the work of building up the body takes place during the hours of rest, it is essential, especially in youth, that sleep should be regular and abundant." Ed 204.4