Good communication is just as stimulating as black coffee, and just as hard to sleep after. – Anne Morrow Lindbergh

A yawn is a silent scream for coffee. – Author Unknown

Sleep is a symptom of caffeine deprivation. – Author Unknown

If you want to improve your understanding, drink coffee. Sir James Mackintosh used to say, he believed the difference between one man and another was produced by the quantity of coffee he drank. – Sydney Smith, quoted in A Memoir of the Reverend Sydney Smith: Volume I by his d