Poor Shelley lost his time with Byron. But, however much Byron objected to his doctrines, he had no similar objection to Shelley himself, for whom he professed a great respect and admiration. He grieved to find so noble an intellect the victim of hallucination which entirely blinded him to the perception of truth. Shelley, however, did not despair of succeeding in making Byron some day give up what he termed his philosophical errors, and his persistency earned for him the appellation of "serpent" which Byron gave him in jest. This persistency, which at the same time indicates the merit of Byron's resistance, has often been mentioned by Shelley himself. Writing from Pisa to a friend in England, a very few days before his death, and alluding to a letter from Moore which Byron had shown him, and wherein "Cain" was attributed to the influence which he (Shelley) had evidently exercised over Byron, he said, "Pray assure Moore that in a philosophical point of view I have not the slightest influence over Byron; if I had, be sure I should use it for the purpose of uprooting his delusions and his errors. He had conceived 'Cain' many years ago, and he had already commenced writing it when I saw him last year at Ravenna. How happy I should be could I attribute to myself, even indirectly, a part in that immortal work!" Moore wrote to Byron on the same subject a little later, and received the following reply:--"As for poor Shelley, who also frightens you and the world, he is, to my knowledge, the least egotistical and kindest of men. I know no one who has so sacrificed both fortune and sentiments for the good of others; as for his speculative opinions, we have none in common, nor do I wish to have any." All the poems which he wrote at this time, and which admitted of his introducing the religious element either purposely or accidentally into them, prove one and all that his mind, as regards religion, was as we have shown it to be. This is particularly noticeable in his mystery called "Heaven and Earth;" but the same remark is applicable to others, such as the "Island," and even to some passages in "Don Juan." "Heaven and Earth"--a poem which appeared about this time, and which he styled "A Mystery"--is a biblical poem in which all the thoughts agree with the Book of Genesis, and "which was inspired," says Galt, "by a mind both serious and patriarchal, and is an echo of the oracles of Adam and of Melchisedec." In this work he exhibits as much veneration for scriptural theology as Milton himself. In the "Island," which he wrote at Genoa, there are passages which penetrate the soul with so religious a feeling, that Benjamin Constant, in reading it, and indignant at hearing Byron called an unbeliever, exclaimed in his work on religion, "I am assured that there are men who accuse Lord Byron of atheism and impiety. There is more religion in the twelve lines which I have quoted than in the past, present, and future writings of all his detractors put together."