The five senses differ in quality, and one can look at this question from a gross point of view or from a finer point of view. The gross point of view is that of the form, which outwardly shows the difference of perception between one sense and the other; and the finer point of view is when the mechanism of the capacity which is inside every organ is distinguished. Science only approaches this question from the outside and not from the inside. It is most ethereal, it is most subtle, it is most inexplicable, and the more one thinks about it, the more one sees the skill of the Creator.