§. In a bodily shape.
First, It was convenient that the Holy Ghost should reveal himself at this time: First, for the sake of John, who was to have a sensible sign, whereby to inform him which was the Messias, as Joh. 1.
Secondly, In regard of the Holy Ghost himself, whose work in the Church was now in a more special and frequent manner to be shewed under the Gospel, namely, that he might be expressed and revealed to be a personal substance, and not an operation of the Godhead only, or qualitative vertue. For qualities, operations and acts cannot as∣sume bodily shapes, nor ought but what is in it self substantial.
Thirdly, That a full and clear, yea, even a sensible demonstration of the Trinity might be made at this beginning of the Gospel. For it may be observed in Scripture, that the Holy Ghost hath a special regard to express this mystery upon singular occa∣sions, that we might learn to acknowledge the three Persons in one Godhead, as he also doth the two natures of Christ, that we might acknowledge them in one person. So the very first thing that is taught in all the Bible, is this very mystery: For when Moses beginneth the Story of the Creation, he beginneth also to teach that the three Persons in the Trinity were co-workers in it. God Created, there is the Father. God said, there is the Word, or the Son. And the Spirit of God moved, there is the Holy Ghost. And the very same mystery is intimated by the Prophet, treating upon the very same Subject, Isa. 42. 5. Thus saith God the Lord, he that created the Heavens,