" A great deal of talent in the world is lost for the want of little courage"."

Sometimes, very talented persons face failures in their lives just because of lack of courage.However,they're pregnant with a gigantic amount of talent but being chicken-hearted,they make no use of it.To accomplish a single task whether it is big or little,confidence is required.Now those who lack it get nothing else but failure due to their own timidity.
(Kindly check it and point out mistakes esp. Grammatical)