"One ought every day at least to hear a little song, read a good poem, see a fine picture, and, if it were possible, to speak a few reasonable words."

"Joy and sorrow are the two sides of the same coin."

"The soul which sees beauty may sometimes walk alone."

"Der Irrtum ist recht gut, solange wir jung sind; man muß ihn nur nicht mit ins Alter schleppen."

"The true man of science is he who gives importance to the little, because he sees the greatness of the great in it."