Somebody said that it couldn’t be done, but he with a chuckle replied that “maybe it couldn’t,” but he would be one who wouldn’t say so till he tried. So he buckled right in with the trace of a grin on his face. If he worried, he hid it. He started to sing as he tackled the thing that couldn’t be done, and he did it. Somebody scoffed, “Oh, you’ll never do that, at least no one ever has done it”. But he took off his coat and he took off his hat, and the first thing we knew he’d begun it. With a lift of his chin and a bit of a grin, without any doubting or quitting, he started to sing as he tackled the thing that couldn’t be done, and he did it. There are thousands to tell you it cannot be done. There are thousands to prophesy failure. There are thousands to point out to you, one by one, the dangers that wait to assail you, but just buckle in with a bit of a grin. Just take off your coat and go to it. Just start to sing as you tackle the thing that “cannot be done” and you’ll do it.
-Edgar A. Guest

This reading is also found in JewBelong sections:
Baby Naming
Bar and Bat Mitzvah