The rhetoric of this passage raises a very important question. Are the people who are taking this drug really themselves still? If this was just a thought enhancing drug then perhaps this would be the case, however it does more than just make the user hyper-intelligent. The fact that this drug changes people's attitudes and their personalities proves that these people aren't themselves. On the other hand a hyper-intelligence may not directly change the person, but may enable them because a higher intelligence could reasonably lead to a higher confidence and a higher rationale of thinking.