Cowardice, as distinguished from panic, isalmost always simply a lack of ability to suspend the functioning of the imagination.

-Hemingway, Ernest Millar
  Introduction to Men  At War.

As an old soldier I admit the cowardice: it's as universal as sea sickness, and matters just as little.

-Shaw, George Bernard
  The Statue. Man and Superman, act 3.

I hate liberality. Nine times out of ten it is cowardiceöand the tenth time, lack of principle.

-Sidmouth, HenryAddington, 1stViscount
Attributed.

There are several good protections against temptation but the surest is cowardice.

-Twain, Mark pseudonym of  Samuel Langhorne Clemens
  Following the Equator, ch.36.