ABSTRACT
When the mind is full of any one subject, that subject seems to recur with extraordinary frequency — it appears to pursue or to meet us at every turn; in every conversation that we hear — in every book we open — in every newspaper we take up, the reigning idea recurs, and then we are surprised, and exclaim at these wonderful coincidences. Probably such coincidences a happen every day, but pass unobserved when the mind is not intent upon similar ideas, or wakened by any strong analogous feeling.
