"Lectures which really teach will never be popular; lectures which are popular will never really teach."

"The important thing is to know how to take a hint, to seize upon the suggestion, however small, and to extract its full value."

"I am no poet, but if you think for yourselves, as I proceed, the facts will form a poem in your minds."

"I am busy just now again on the old subject of light and experiment, and hope to have some new views to bring out."

"I am a firm believer in the power of observation and experimentation."