The question of whether his work is to be interpreted literally, mystically, or both has been a source of contention among western scholars. On the one hand, some of his early readers such as William Jones saw in him a conventional lyricist similar to European love poets such as Petrarch. Others scholars such as Henry Wilberforce Clarke saw him as purely a poet of didactic, ecstatic mysticism in the manner of Rumi, a view that a minority of twentieth century critics and literary historians have come to challenge. Ralph Waldo Emerson rejected the Sufistic view of wine in Hafez's poems.