"It requires indeed some courage to undertake a labor of such far-reaching extent; this appears, however, to be the only right way by which we can finally reach the solution of a question the importanc…"

"I have experienced many a bitter hour in my life. Nevertheless, I admit gratefully that the beautiful, good hours far outnumbered the others."

"My scientific studies have afforded me great gratification; and I am convinced that it will not be long before the scientific world will become acquainted with the results of my experiments."

"I have been treated as a heretic in my own time, but truth will prevail."

"I have been called a dreamer, but the numbers do not dream."