"There is only one thing people like that is good for them; a good night's sleep" ~
Edgar Watson Howe (American Editor, Novelist and Essayist, He was known as the Sage of Potato Hill, 1853-1937)

bedrock
n.
1. The solid rock that underlies loose material, such as soil, sand, clay, or gravel.
2a. The very basis; the foundation: Ownership of land is the bedrock of democracy.
2b. The lowest point: personal finances that were at bedrock.