Desk sign at St. Louis Office Supply Company: "Don't be indispensable. If you can't be replaced, you can't be promoted."
Sometime, when you're feeling important, Sometime, when your ego's in bloom; Sometime, when you take it for granted You're the best qualified man in the room; Sometime, when you feel that your going Would leave an unfillable hole, Just follow this simple instruction And see how it humbles the soul. Take a bucket and fill it with water; Put your hand in it, up to the wrist; Pull it out; and the hole that's remaining is a measure of how you'll be missed. You may splash all you please, when you enter, You can stir up the water galore, But stop and you'll find in a minute That it looks quite the same as before.
The moral in this quaint example Is do just the best that you can, Be proud of yourself, but remember&md; There's NO indispensable man!