Do they too, then, mean this by their worship? Well, is it anything but absurdity to think that it is wrong to honour the Holy Spirit with that with which the patriarch honoured even Canaanites? Or do they consider their “worship” something different to this, as if one sort were fitting for men, another sort for the Supreme Being? But then, how is it that they omit worship altogether in the instance of the Spirit, not even bestowing upon Him the worship conceded in the case of men?
And what kind of worship do they imagine to be reserved especially for the Deity? Is it to be spoken word, or acted gesture? Well, but are not these marks of honour shared by men as well? In their case words are spoken and gestures acted. Is it not, then, plain to every one who possesses the least amount of reflection, that any gift worthy of the Deity mankind has not got to give; for the Author of all blessings has no need of us. But it is we men who have transferred these indications of respect and admiration, which we adopt towards each other, when we would show by the acknowledgment of a neighbour's superiority that one of us is in a humbler position than another, to our attendance upon a Higher Power; out of our possessions we make a gift of what is most precious to a priceless Nature.
Therefore, since men, approaching emperors and potentates for the objects which they wish in some way to obtain from those rulers, do not bring to them their mere petition only, but employ every possible means to induce them to feel pity and favour towards themselves, adopting a humble voice, and a kneeling position, clasping their knees, prostrating themselves on the ground, and putting forward to plead for their petition all sorts of pathetic signs, to wake that pity—so it is that those who recognize the True Potentate, by Whom all things in existence are controlled, when they are supplicating for that which they have at heart, some lowly in spirit because of pitiable conditions in this world, some with their thoughts lifted up because of their eternal mysterious hopes, seeing that they know not how to ask, and that their humanity is not capable of displaying any reverence that can reach to the grandeur of that Glory, carry the ceremonial used in the case of men into the service of the Deity.
And this is what “worship” is—that, I mean, which is offered for objects we have at heart along with supplication and humiliation. Therefore Daniel too bends the knees to the Lord, when asking His love for the captive people; and He Who “bare our sicknesses,” and intercedes for us, is recorded in the Gospel to have fallen on His face, because of the man that He had taken upon Him, at the hour of prayer, and in this posture to have made His petition, enjoining thereby, I think, that at the time of our petition our voice is not to be bold, but that we are to assume the attitude of the wretched; since the Lord “resists the proud, but gives grace unto the humble;” and somewhere else (He says), “he that exalts himself shall be abased.”
If, then, “worship” is a sort of suppliant state, or pleading put forward for the object of the petition, what is the intention of these new-fashioned regulations? These men do not even deign to ask of the Giver, nor to kneel to the Ruler, nor to attend upon the Potentate.
Source: On the Holy Spirit (Against the Followers of Macedonius) (New Advent)