If you have not the Spirit of God you are none of his

But ye are not in the flesh, but in the Spirit, if so be that the Spirit of God dwell in you. Now if any man have not the Spirit of Christ, he is none of his. (Romans 8:9 KJV)

But ye are not in the flesh but in the Spirit, if so be that the Spirit of God dwelleth in you. But if any man hath not the Spirit of Christ, he is none of his. (Romans 8:9 ASV)

William Burkitt New Testament

Observe, He does not say the flesh is not in you, but ye are not in the flesh, so as to be acted and influenced, guided and governed, misled and carried away by it. Sincere and serious Christians, although they live in the flesh, yet do they not live after the flesh: But ye are in the Spirit, that is, illuminated, inclined, and enabled by the Spirit to do the will of God: And the Spirit of God dwelleth in you, as a spirit of truth to enlighten your understandings, as a Spirit of holiness to renew your will and affections, as a Spirit of love to inspire the soul with divine and unutterable desires after the favour and grace of God; and the phrase, dwelling, imports presence and propriety, fellowship and intimacy, operation and activity, residence and constancy of abode.

Observe here, 1. That the Holy Ghost is called the Spirit of Christ passively, and by way of reception, as being bestowed upon him and received by him; also actively, and by way of collation, as being bestowed by him, and conveyed from him.

Observe, 2. That all sincere Christians have the Spirit of Christ, they have him for the blessing of conversion, they have him for the benefit of communion. He dwells in them by his sanctifying impressions, powerful assistance, quickening and comforting influences. He pours in both the oil of grace, and also the oil of joy and gladness into their hearts.

Observe, 3. There are some that have not the Spirit of Christ: Those who are carnal and sensual have not the Spirit; those who are censorious and envious have not the Spirit; those who are malicious and revengeful have not the Spirit; those who are implacable and of an irreconcileable temper of spirit have not the Spirit of Christ.

Observe, 4. That all those who have not the Spirit of Christ, are none of Christ’s; they have no spiritual relation to him, they have no special interest in him, and can expect no present consolation or future happiness from him: The proposition is indefinite, and without exception. If any man, prince or peasant, rich or poor, bond or free, have not the Spirit of Christ, he is none of Christ’s.