“Actually, I jade very quickly. Once is usually enough. Either once only, or every day. If you do something once it’s exciting, and if you do it every day it’s exciting. But if you do it, say, twice or just almost every day, it’s not good any more.”

Source: The Shadow of the Bear

Quoted by The Denver Post http://www.denverpost.com/commented/ci_18233378, 9 June 2011

14 April 1747
Letters to His Son on the Art of Becoming a Man of the World and a Gentleman (1774)

On "eyeing" for Mars, IAC 2016 meeting, presentation on sustainable Mars colonization.

Original: Fare ogni giorno ciò che vi piace vi farà sentire molto soddisfatti. E l'unico modo per fare bene ciò che vi piace sarà amare ciò che fate.
Source: prevale.net

"'Biggest Loser' host Bob Harper's 5 steps to a healthier new year" https://www.today.com/health/biggest-loser-host-bob-harper-s-health-tips-new-year-t106445, interview with Today (December 27, 2016).

Lines written for River Song, in Forest of the Dead [4.9] (7 June 2008)
Context: Everybody knows that everybody dies. But not every day. Not today. Some days are special. Some days are so, so blessed. Some days, nobody dies at all. Now and then, every once in a very long while, every day in a million days, when the wind stands fair and the Doctor comes to call, everybody lives.

Source: Clockwork Prince