Thomas Edison tried two thousand different materials
in search of one suitable for use as the filament for a light bulb. When none
worked satisfactorily, his assistant complained, “All our work is in vain as we
have learnt nothing so far during all our attempts to find a suitable filament
for the bulb.”
Edison replied very confidently, “Oh, we have come a
long way and we have learnt a lot for we now know that there are two thousand
elements which we can’t use to make a good light bulb.”
Lesson: Learn from your mistakes
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