Man is an animal which, alone among the animals, refuses to be satisfied by the fulfilment of animal desires.

Sometimes we stare so long at a door that is closing that we see too late the one that is open.

Morse conquered his electrical difficulties although he was only a painter, and I don't intend to give in either till all is completed.

I have discovered that my interest in my dear pupil, Mabel, has ripened into a far deeper feeling than that of mere friendship. In fact, I know that I have learned to love her very sincerely.

In this experiment, made on the 9th of October, 1876, actual conversation, backwards and forwards, upon the same line, and by the same instruments reciprocally used, was successfully carried on for the first time upon a real line of miles in length.

A man's own judgment should be the final appeal in all that relates to himself.