The quote goes: "the lord gave us two ends to use:one to think with and one to sit with. The war depends on which we choose - heads we win, tails we lose." Sent as a motto by ADM Nimitz to ADM Halsey.
Can anyone tell me the background on the reason Nimitz said this to Halsey?

Pershing's Poem

General Pershing was fond of quoting this little poem to members of his staff:
The Lord gave us two ends to use:
One to think with, one to sit with,
The war depends on which we choose.
Heads we win, tails we lose.
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We have two ends,
With a common link;
With one we sit,
With one we think.
Success depends on what we use
Heads we win; tails we lose!