"If only I had the theorems! Then I should find the proofs easily enough."
This quote is generally attributed to Bernhard Riemann. In particular, on page 9 in Proofs and refutations by Imre Lakatos, where it is referred to page 487 in Die mathematische Methode. Logisch erkenntnistheoretische Untersuchungen im Gebiete der Mathematik, Mechanik und Physik. Berlin: Springer, 1924, by Otto H\"older.
I read German but I do not have access to the book by H\"older. Does anyone know the original quote in German? The context? Where does it come from? What is in the book by H\"older?