...confirms for me the inestimable, invaluable worth of a good night's 'beauty sleep'

-which, to requote the bard best I can, so effectively/efficiently 'closes up the ravelled sleeve of care'

Among numerous, even innumerable - certainly hard to briefly itemize/catalog - blessings galore... 

Epilogue: With it one can do a heckuva lot, without it stuff all; as I'm proving - in both instances - in my own ever fraught life-experience at present!