Ba. Because as our Bodies do live by Breath, so our Minds are quicken'd by the secret Inspiration of the holy Spirit.
Au. Is it not lawful to call the Father a Spirit?
Ba. Why not?
Au. Are not then the Persons confounded?
Ba. No, not at all, for the Father is called a Spirit, because he is without a Body, which Thing is common to all the Persons, according to their divine Nature: But the third Person is called a Spirit, because he breathes out, and transfuses himself insensibly into our Minds, even as the Air breathes from the Land, or the Rivers.
Au. Why is the Name of Son given to the second Person?
Ba. Because of his perfect Likeness of Nature and Will.
Au. Is the Son more like the Father, than the holy Spirit?
Ba. Not according to the divine Nature, except that he resembles the Property of the Father the more in this, that the Spirit proceeds from him also.
Au. What hinders then, but that the holy Spirit may be called Son.