Depend upon it there comes a time when for every addition of knowledge you forget something that you knew before. It is of the highest importance, th… - Arthur Conan Doyle

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Engraved portrait of Arthur Conan Doyle, facing right

Depend upon it there comes a time when for every addition of knowledge you forget something that you knew before. It is of the highest importance, therefore, not to have useless facts elbowing out the useful ones.

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About Arthur Conan Doyle

Sir Arthur Ignatius Conan Doyle (May 22 1859 – July 7 1930) was a British writer and physician, most famous as the creator of the character Sherlock Holmes.

Biography information from Wikiquote · Portrait adapted from Wikimedia Commons, Walter Benington (Public domain / CC0)

Also Known As

Birth Name: Arthur Ignatius Conan Doyle
Native Name: Sir Arthur Ignatius Conan Doyle
Alternative Names: Sir A. Conan Doyle Arthur Conan, Sir Doyle Sir Arthur Conan Doyle Conan Doyle

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He had never said as much before, and I must admit that his words gave me keen pleasure, for I had often been piqued by his indifference to my admiration and to the attempts which I had made to give publicity to his methods. I was proud, too, to think that I had so far mastered his system as to apply it in a way which earned his approval.

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Nothing could exceed his energy when the working fit was upon him: but now and again a reaction would seize him, and for days on end he would lie upon the sofa in the sitting- room, hardly uttering a word or moving a muscle from morning to night. On these occasions I have noticed such a dreamy, vacant expression in his eyes, that I might have suspected him of being addicted to the use of some narcotic, had not the temperance and cleanliness of his whole life forbidden such a notion.

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