I think he was trying to say that the magnitude of the mental boost from using amphetamines will not compensate for the health risks, and that if your mental sk

I think he was trying to say that the magnitude of the mental boost from using amphetamines will not compensate for the health risks, and that if your mental skills are not already extremely sharp without amphetamines (like those of Erdos), then the drugs might not give you the effect you expect.