When one read's Kierkegaard's profound analyses of anxiety and despair or Nietzsche's amazingly acute insights into the dynamics of resentment and the guilt and hostility which accompany repressed emotional powers, one might pinch oneself to realize that one is reading works written in the last century and not some new contemporary psychological analysis.
Rollo May (2015). “The Discovery of Being”, p.53, W. W. Norton & Company