The Ketuvim sector of the Hebrew Bible is a collection of philosophical and artistic literature believed to have been written under the influence of Ruach ha-Kodesh (the Holy Spirit). The Book of Job, for instance, addressing the problem of theodicy – the vindication of the justice of God in the light of humanity's suffering – it is a rich theological work setting out a variety of perspectives. It has been widely and often extravagantly praised for its literary qualities, with Alfred, Lord Tennyson calling it "the greatest poem of ancient and modern times".