After that, he taught at the Syrian Protestant College (later renamed the American University of Beirut) and wrote on poetry, rhetoric, grammar and philosophy.
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With Bustani and Mikhail Mishaqa, al-Yaziji formed the Syrian Association for the Sciences and Arts – the Arab world's first literary society – in 1847.
He was editor of several newspapers and magazines such as Nagah, Tabib, Diya, and was instructed by Jesuits to translate the Bible into Arabic.