The saying that a little knowledge is a dangerous thing is, to my mind, a very dangerous adage. If knowledge is real and genuine, I do not believe that it is other than a very valuable posession, however infinitesimal its quantity may be. Indeed, if a little knowledge is dangerous, where is a man who has so much as to be out of danger?

The great thing in the world is not so much to seek happiness as to earn peace and self-respect.

The dogma of the infallibility of the Bible is no more self-evident than is that of the infallibility of the popes.

The secret of genius is to carry the spirit of childhood into maturity.

Only a scientific people can survive in a scientific future.

Within the last fifty years, the extraordinary growth of every department of physical science has spread among us mental food of so nutritious and stimulating a character that a new ecdysis seems imminent.

The birth of science was the death of superstition.