“ None the less his merits as an original thinker are far outshone by his splendid services to the history of philosophy. It is true that his view of Greek thought is somewhat warped by Hegelian formalism. He is not alive enough to the very intimate relation which thought holds to national life and to the idiosyncrasy of the thinker. He lays too much stress upon the “concept,” and explains too much by the Hegelian antithesis of subjective and objective. Nevertheless his history of Greek philosophy remains a noble monument of solid learning informed with natural sagacity. ”

“ In 1840 he was Privatdozent of theology at Tübingen, in 1847 professor of theology at Bern, in 1849 professor of theology at Marburg, migrating soon afterwards to the faculty of philosophy as the result of disputes with the Clerical party. He became professor of philosophy at Heidelberg in 1862, removed to Berlin in 1872, and retired in 1895. ”

“ Über Bedeutung und Aufgabe d. Erkenntniss-Theorie (1862) ; Über teleolog. und mechan. Naturerklärung (1876) ; Vorträge und Abhandlungen (1865-84) ; Religion und Philosophie bei den Römern (1866, ed. 1871) ; Philosoph. ”