Pope has no strong convictions in this poem, but he has many moods. On one page he is a pantheist, on another he says what he probably did not mean, that God inspires men to do evil, and on a third that 'all our knowledge is ourselves to know.' Nowhere in the argument does Pope seem to have a firm standing, and De Quincey is not far wrong in saying that it is 'the realization of anarchy.' Read the poem for its poetical merits and you will forget its defects. Pope was a superficial teacher, but direct teaching is not the end of poetry. _The Essay on Man_ is not a poem which can be read and re-read with ever-growing delight, but there are passages in it of as fine an order as any that he has composed on more familiar subjects. Pope was, as Sir William Hamilton said, a curious reader, and the ideas versified in the poem may be traced to a variety of sources. Students who wish to follow this track will find all the help they need in Mr. Pattison's instructive notes, and in the comments attached to the poem in Elwin and Courthope's edition. In his Introduction Mr. Pattison observes that 'the subject of the _Essay on Man_ is not, considered in itself, one unfit for poetry. Had Pope had a genius for philosophy there was no reason why he should not have selected a philosophical subject. Didactic poetry is a mistake if not a contradiction in terms. But poetry is not necessarily didactic because its subject is philosophical.' It is always difficult to define the themes suitable for poetry. Many theories have been formed as to the scope of the art, and poets have been amply instructed by critics as to what they ought to do, and what they should avoid doing. The theories may appear sound, the arguments convincing, until a great poet arises and knocks them on the head. In a sense every poet of the highest order is also a philosopher and a prophet who sees into 'the life of things.' Whether a philosophical subject can be fitly represented in the imaginative light of poetry is a matter for discussion rather than for decision. In the case of Pope, however, it will be evident to all studious readers that he was incapable of the continuous thought needed for the argument of the _Essay_. 'Anything like sustained reasoning,' says Mr. Leslie Stephen,' was beyond his reach. Pope felt and thought by shocks and electric flashes.... The defect was aggravated or caused by the physical infirmities which put sustained intellectual labour out of the question.'[23]