The average, healthy, well-adjusted adult gets up at seven-thirty in the morning feeling just plain terrible.

Jean Kerr (1922–2003) American author and playwright [b. Bridget Jean Collins]

Essay (1957-07-27), “Children Really Are Not People,” Saturday Evening Post
    (Source)

Collected as "Where Did You Put the Aspirin?" in Please Don't Eat the Daisies (1957).