Romans 1:9

23. And inasmuch as there are three things of which man consists, namely, spirit, soul, and body, which again are spoken of as two, because frequently the soul is named along with the spirit; for a certain rational portion of the same, of which beasts are devoid, is called spirit: the principal part in us is the spirit; next, the life whereby we are united with the body is called the soul; finally, the body itself, as it is visible, is the last part in us. This “whole creation” ( creatura ), however, “groaneth and travaileth until now.” Nevertheless, He has given it the first-fruits of the Spirit, in that it has believed God, and is now of a good will. …

23. Thus, as regards murder, which was understood to mean merely the destruction of the body, by which a man is deprived of life, the Lord explained that every unjust disposition to injure our brother is a kind of murder. So John also says, "He that hateth his brother is a murderer." And as it was thought that adultery meant only the act of unlawful intercourse with a woman, the Master showed that the lust He describes is also adultery. Again, because perjury is a heinous sin, while there is no sin either in not swearing at all or in swearing truly, the Lord wished to secure us from departing from the truth by not swearing at all, rather than that we should be in danger of perjury by being in the habit of swearing truly. For one who never swears is less in danger of swearing falsely than one who is in the habit of swearing truly. …

51. “Again,” says He, “ye have heard that it hath been said to them of old time, Thou shalt not forswear thyself, but shalt perform unto the Lord thine oath: But I say unto you, Swear not at all; neither by heaven, for it is God’s throne; nor by the earth, for it is His footstool; neither by Jerusalem, for it is the city of the great King. Neither shalt thou swear by thy head, because thou canst not make one hair white or black. But let your communication be Yea, yea; Nay, nay: for whatsoever is more than these cometh of evil.” The righteousness of the Pharisees is not to forswear oneself; and this is confirmed by Him who gives the command not to swear, so far as relates to the righteousness of the kingdom of heaven. For just as he who does not speak at all cannot speak falsely, so he who does not swear at all cannot swear falsely. …

Ver. 9 . “For God is my witness, whom I serve with my spirit in the Gospel of His Son.”

“Because of the grace that is given me of God.” As he said at the beginning, “I am a debtor.” ( Rom. i. 14 .) As if he had said, I have not snatched at the honor for myself, neither was I first to leap forward to it, but God commanded this, and this too according unto grace, not as if He had separated me for this office because I deserved it. Do not ye then be exasperated, since it is not I that raise myself up, but it is God that enjoins it. And as he there says, “whom I serve in the Gospel of His Son” ( ib. 9 ), so also here, after saying, “because of the grace given unto me by God,” he adds,

If then He in times past sought such as these, He allowed to those others their way of worship, not willingly, but from condescension, and for this reason, that He might bring them in also. Who then are “the true worshipers”? Those who confine not their service by place, and who serve God in spirit; as Paul saith, “Whom I serve in my spirit in the Gospel of His Son”: and again, “I beseech you that ye present your bodies a living sacrifice, acceptable unto God, your reasonable service.” ( Rom. i. 9 and xii. 1 .) But when he saith,