Nietzsche and Schopenhauer

A major philosophical influence on Nietzsche was Schopenhauer. Scandalously, Schopenhauer is often left unread these days and what is often a Schopenhauerian thought read in one of Nietzsche's books, who still retains an allure for the contrarian wishing to take on the world, is often misinterpreted.

Hence, the following from Ecce Homo, which is classic Schopenhauer and brilliantly expounded in his epistemology, is often just taken as an one of Nietzsche's sui generis philosophical insights:

No one can draw more out of things, books included, than he already knows. A man has no ears for that to which experience has given him no access.