The key to all sciences is unquestionably the question mark. To the word How? we owe most of our greatest discoveries. Wisdom in life may perhaps consist in asking ourselves on all occasions: Why?
To forget is the great secret of strong creative natures; to forget is the way nature herself who knows no past and who at every hour begins the mysteries of her untiring labors afresh.
All men can bear a familiar, definite misfortune better than the cruel alternations of a fate which, from one moment to another, brings excessive joy or sorrow.