Read "Schopenhauer as Educator" by Friedrich Nietzsche online for free on Textopian. Full text with search, annotations, highlights, and AI-powered reading aids.
The last hint may well remain obscure for a time: I have something more easy to explain, namely how Schopenhauer can help us to educate ourselves _in opposition_ to our age, since we have the advantage of really knowing our age, through him; -- if it be an advantage! It may be no longer possible in a couple of hundred years. I sometimes amuse myself with the idea that men may soon grow tired of books and their authors, and the savant of to-morrow come to leave directions in his will that his body be burned in the midst of his books, including of course his own writings. And in the gradual clearing of the forests, might not our libraries be very reasonably used for straw and brushwood? Most books are born from the smoke and vapour of the brain: and to vapour and smoke may they well return. For having no fire within themselves, they shall be visited with fire.
And possibly to a later century our own may count as the "Dark age," because our productions heated the furnace hotter and more continuously than ever before. We are anyhow happy that we can learn to know our time; and if there be any sense in busying ourselves with our time at all, we may as well do it as thoroughly as we can, so that no one may have any doubt about it. The possibility of this we owe to Schopenhauer.