Question 121: Why is it here added, "Which art in heaven"?

Answer: Lest we should form any earthly conceptions of God's heavenly majesty, (a) and that we may expect from his almighty power all things necessary for soul and body. (b)

(a) Jer.23:23, 24 Am I a God at hand, saith the LORD, and not a God afar off? Can any hide himself in secret places that I shall not see him? saith the LORD. Do not I fill heaven and earth? saith the LORD.
Acts 17:24, 25, 27 God that made the world and all things therein, seeing that he is Lord of heaven and earth, dwelleth not in temples made with hands; 25 Neither is worshipped with men's hands, as though he needed any thing, seeing he giveth to all life, and breath, and all things; 27 That they should seek the Lord, if haply they might feel after him, and find him, though he be not far from every one of us:
(b) Rom.10:12 For there is no difference between the Jew and the Greek: for the same Lord over all is rich unto all that call upon him.