Thus far the author: unconscious that he had fallen into the serious error of confounding the affective with the intellectual faculties, and not appearing to understand that, whereas an affective faculty can be brought into conscious action by independent circumstances, an intellectual faculty requires a direct mental effort before it is excited. His essay was not convincing. He wandered off at tangents; laid down a theory, and, proceeding to establish it, so entangled himself that he lost its connecting threads; and had evidently been unable to properly think out a subject which is not entirely unworthy of consideration. However, he had written his book, and it got into Dan's hands and into Dan's head. Joshua did not understand it a bit, and said so; and when he asked Dan to explain it, Dan could scarcely fit words to what was in his mind. "Although I cannot explain it very clearly, I can understand it," said Dan. "He means to say that a person can see with his mental sight"-- "That is, with his eyes shut," interrupted Joshua jocularly. "Certainly, with his eyes shut," said Dan very decidedly. "Our eyes are shut when we dream, yet we see things." Joshua became serious immediately; the answer was a convincing one. "And that proves that we have two senses of sight--one in the eyes, the other in the mind. Haven't you seen rings, and circles, and clouds when you are in bed at night, and before you go to sleep? I can press my face on the pillow and say--not out loud, and yet I say it and can hear it--which shows that all our senses are double." (In his eagerness to explain what he could scarcely comprehend, Dan was in danger of falling into the same error as the author of the "Triumph of Mind over Matter" had fallen into, that of flying off at tangents: it was with difficulty he could keep to his subject.) "Well, Jo, I press my head into the pillow, and say, 'I will see rings,' and presently I see a little ball, black, perhaps, and it grows and grows into rings--like what you see when you throw a stone in the water--larger, and larger, all the different colors of the rainbow; and then, when they have grown so large as to appear to have lost themselves in space--just like the rings in the water, Jo--another little ball shapes itself in the dark, and gradually becomes visible, and then the rings come and grow and disappear as the others did. When I have seen enough, I say--not out loud again, Jo, but silently as I did before--'I don't want to see any more,' and they don't come again. What I can do with rings, I can do with clouds. I say, 'I will see clouds,' and they come, all colors of blue, from white-blue to black-blue; sometimes I see sunsets." "I have seen them too, Dan," said Joshua; "I have seen skies with stars in them, just as I have seen them with my eyes wide open." "Now, if we can do this," continued Dan, "why cannot we do more?"