“Bite on the bullet, old man, and don't let them think you're afraid.”
The Light That Failed http://whitewolf.newcastle.edu.au/words/authors/K/KiplingRudyard/prose/TheLightThatFailed/index.html, ch. 11 (1890-1891).
Other works
Help us to complete the source, original and additional information
Rudyard Kipling 200
English short-story writer, poet, and novelist 1865–1936
Related quotes

Swimming advice to physician Zhisui Li (1966), quoted in The TIME 100 (13 April 1998) http://www.time.com/time/time100/leaders/profile/mao.html

“Now, you're thinking of Europe as Germany and France. I don't. I think that's old Europe.”
As quoted in "Outrage at 'old Europe' remarks" in BBC News (23 January 2003) http://news.bbc.co.uk/2/hi/europe/2687403.stm
2000s

“Thoughts, like fleas, jump from man to man, but they don't bite everybody.”
p, 125
Unkempt Thoughts (1957)

Source: Halliwell, Leslie, Halliwell's Who's Who in the Movies http://books.google.com/books?id=cnMelOEV10YC, 4th ed. (2006) HarperCollins

“I am more afraid of King Alcohol than of all the bullets of the enemy.”
As quoted in Personal Reminiscences, Anecdotes, and Letters of Gen. Robert E. Lee (1874) by John William Jones, p. 171

“I love women who don't let themselves be tamed. Those who scratch and bite, but know how to love.”
Original: Adoro le donne che non si lasciano domare. Quelle che graffiano e mordono, ma sanno amare.
Source: prevale.net