The ideology of such an advanced philosophy cannot be successfully and quickly spread by lip or pen. It can spread slowly but steadily by the force of evolutionary experience alone. Men must grow into its acceptance; they cannot be converted. Such has hitherto been the historic generalization. But the twentieth century is outstanding for the rushing tempo of its ideological development. We may rightly expect therefore that more are ready for this philosophy than ever before.
-- Notebooks Category 20: What Is Philosophy? > Chapter 2: Its Contemporary Influence > # 89