Both Grotius and Wetstein had been the forerunners of Ernesti in this method of interpretation. What he wrought against the New Testament had its counterpart in the mischief effected by John David Michaelis against the Old. This theologian was profoundly learned in the Oriental languages, but he was a reckless and irreverent critic. He made light of many of the occurrences of the Old Testament, and whenever the students applauded one of his obscene jokes, he was tickled into childishness. He made no claim to an experimental acquaintance with the operations of the Holy Spirit, and used his position as theological professor and lecturer only as the stepping-stone to money and fame. He would make Moses a very good sort of statesman, but took care to cast censure upon him whenever the feeblest occasion was offered. Still he did not go so far as to cause great offense to his Jewish readers, who were very numerous at that time, for that would have endangered the pecuniary profits from his books. He lectured on every subject that came in his way, and discussed from his chair natural science, politics, agriculture, and horse-breeding, with as much respect and reverence as the song of Moses or the utterances of Isaiah. He carried Ernesti's principles a step farther than that scholar had done. He held that it is necessary not only to understand the situation and circumstances of the writer and people at the time and place in which the books were written, and the language and history of the time, but all things connected with their moral and physical character. The critic must also be conversant with everything relating to those nations with whom the Jews associated, and know just how far the latter received their opinions and customs from abroad.