These things cannot be measured by time, a year has no meaning, and ten years are nothing. To be an artist means: not to calculate and count; to grow and ripen like a tree which does not hurry the flow of its sap and stands at ease in the spring gales without fearing that no summer may follow. It will come. But it comes only to those who are patient, who are simply there in their vast, quiet tranquility, as if eternity lay before them. It is a lesson I learn every day amid hardships I am thankful for: patience is all!
Letter to Franz Xaver Kappus (Viareggio near Pisa in Italy, 23 April 1903).