A special agency is also attributed to them as the servants of Christ in the advancement of his Church. As the law was given through their ministry, as they had charge of the theocratic people under the old economy, so they are spoken of as being still present in the assembly of the saints (1 Cor. xi. 10), and as constantly warring against the dragon and his angels. This Scriptural doctrine of the ministry of angels is full of consolation for the people of God. They may rejoice in the assurance that these holy beings encamp round about them; defending them day and night from unseen enemies and unapprehended dangers. At the same time they must not come between us and God. We are not to look to them nor to invoke their aid. They are in the hands of God and exercise his will; He uses them as He does the winds and the lightning (Heb. i 7), and we are not to look to the instruments in the one case more than in the other.

Charles Hodge, Systematic Theology, Vol. 1, 643.