"I visited him," said Imlac, "with more and more frequency, and was every time more enamoured of his conversation: he was sublime without haughtiness, courteous without formality, and communicative without ostentation. I was, at first, great princess, of your opinion; thought him the happiest of mankind; and often congratulated him on the blessing that he enjoyed. He seemed to hear nothing with indifference but the praises of his condition, to which he always returned a general answer, and diverted the conversation to some other topick. "Amidst this willingness to be pleased, and labour to please, I had, quickly, reason to imagine, that some painful sentiment pressed upon his mind. He often looked up earnestly towards the sun, and let his voice fall in the midst of his discourse. He would sometimes, when we were alone, gaze upon me, in silence, with the air of a man, who longed to speak what he was yet resolved to suppress. He would often send for me, with vehement injunctions of haste, though, when I came to him, he had nothing extraordinary to say. And sometimes, when I was leaving him, would call me back, pause a few moments, and then dismiss me." CHAP. XLI. THE ASTRONOMER DISCOVERS THE CAUSE OF HIS UNEASINESS. "At last the time came, when the secret burst his reserve. We were sitting together, last night, in the turret of his house, watching the emersion of a satellite of Jupiter. A sudden tempest clouded the sky, and disappointed our observation. We sat awhile silent in the dark, and then he addressed himself to me in these words: 'Imlac, I have long considered thy friendship as the greatest blessing of my life. Integrity, without knowledge, is weak and useless; and knowledge, without integrity, is dangerous and dreadful. I have found in thee all the qualities requisite for trust--benevolence, experience, and fortitude. I have long discharged an office, which I must soon quit at the call of nature, and shall rejoice, in the hour of imbecility and pain, to devolve it upon thee.' "I thought myself honoured by this testimony, and protested, that whatever could conduce to his happiness, would add likewise to mine.