In respect to the Domain of Mind, _Positive Mental Experience_ (Feelings, Thoughts, and Volitions, including self-consciousness) are the _Positive_ Factor, the _Something_ of Mentality. _Inexperience_, the lack of mental exercitation, hence _Ignorance_, is the _Negative_ Factor, or _Nothing_. The Correspondential Relationship or Analogy existing between this Domain of the Universe and others already mentioned is testified to in a remarkable manner by our use of Language. We denominate the want of Feeling _Cold_ or _Frigidity_--in respect to the Mind or the individual character. The absence of Thought and Knowledge, or, in other words, Intellectual Barrenness, is called _Darkness_ or _Obscurity_ of the Mind. While the lack of Will or Purpose in the Mind is said to be the absence of _Tension_ or _Strain_ (the great Musical term); and the Stillness or quiet hence resulting may be appropriately designated as the _Silence_ of the Mind; Musical Silences being, as pointed out above, technically termed Rests. With this superficial exhibition of the most radical aspect of the _Echo of Idea_ or _Repetition of Type_ which subsists between all the departments of the Universe, I pass to the more specific consideration of this Analogy as concerning the Domain of Thought and the Domain of Language. Setting aside from our present consideration _Silence_, the _Negative_ factor or _Negatismus_ of Language, and fixing our attention upon _Sound_, the Positive factor or _Positismus_ of Language, we discover it to be composed of two constituents, _Vowels_ and _Consonants_. The _Vowel_ is the _Substance_, the Reality of Language, and the _Consonant_ is the _Form_, the Limitation. By _Vowel_ sound is meant the free or unobstructed, and as such unlimited flow of the vocalized or sounding breath. Vowels are defined in the simplest way as those sounds which are uttered with the month open; as _a_ (ah) in F_a_ther, _o_ in r_o_ll, etc. Consonants are, on the contrary, those sounds which are produced by the crack of commencing or by obstructing, breaking, or cutting off the sounding breath, by completely or partially closing the organs of speech; as, for instance, by closing the lips, as when we pronounce _p_ie, _b_y, _m_y, etc.; or by pressing the point of the tongue against the gums and teeth, as when we say t_ie_, d_ie_, etc.; or by lifting the body of the tongue against the hard palate or roof of the mouth, as when we give the _k_ or hard _g_ sound, as in rac_k_, ra_g_, or in any other similar way.