Robert A. Heinlein quote: Never attempt to teach a pig to sing; it wastes your time and...

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Never attempt to teach a pig to sing; it wastes your time and annoys the pig.

Robert A. Heinlein

Inspirational, Funny, Leadership

Time Enough for Love "Prelude II" (1973)

Never attempt to teach a pig to sing; it wastes your time and annoys the pig.

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