9 For God is my witness, whom I serve with my spirit in the gospel of his Son, that without ceasing I make mention of you always in my prayers; 10 Making request, if by any means now at length I might have a prosperous journey by the will of God to come unto you. (Romans 1:9-10 KJV)
William Burkitt’s Commentary
Here we have observable, 1. The apostle’s solemn protestation of his affectionate love unto, and great care and concern for, these Roman converts, whom he was now absent from, yea, whose faces he had never yet seen; Without ceasing, says the apostle, I make mention of you always in my prayers.
Observe, 2. That because the apostle was yet a stranger to them, had never seen them, and they couldn’t know the outgoings of his heart toward them, he solemnly appeals to the heart-searching God, calls him to witness how affectionately he loved them, and how frequently he prayed for them; God is my witness. The words have the force, if not the form of an oath, and teach us, that it is unquestionably lawful in important affairs to swear, to appeal to God, and call him to be a witness of what we either say or do. We find St. Paul did it often, and our Saviour himself did not refuse to answer upon oath when solemnly adjured.
Observe, 3. How the apostle swears by God, not by the creatures, which is the swearing condemned by our Saviour and by St. James, Matthew 5 and James 5.
Note further, How St. Paul appeals to that God, whom he served in or with his spirit; that is, with the apostle’s own spirit, with his heart unfeignedly.
From whence we may remark, That no service can be performed acceptable to almighty God, except the heart and spirit of a Christian be engaged in it. True, the body has its part and share in divine worship, as well as the soul; but the service of the body is never accepted by God unless animated and quickened by an obedient soul.
Oh Christian, serve thy God with thy soul and spirit, as well as with thy tongue and knee! and then thy offering will be more acceptable to God, than the most adorned temples, the most pompous ceremonies, and most costly devotions whatever, with the want of these.