Wings of Angels

The following is taken from Matthew Henry's commentary on Isaiah 6:1-4.

See the bright and blessed attendants on God's throne, in and by whom his glory is celebrated and his government served: Above the throne, as it were hovering about it, or nigh to the throne, bowing before it, with an eye to it, the seraphim stood, the holy angels, who are called seraphim-burners; for he makes his ministers a flaming fire (Ps. 104:4). They burn in love to God, and zeal for his glory and against sin, and he makes use of them as instruments of his wrath when he is a consuming fire to his enemies. Whether they were only two or four, or (as I rather think) an innumerable company of angels, that Isaiah saw, is uncertain (see Dan. 7:10).

It is the glory of the angels that they are seraphim, have heat proportionate to their light, have abundance, not only of divine knowledge, but of holy love.

Special notice is taken of their wings (and of no other part of their appearance), because of the use they made of them, which is designed for instruction to us. They had each of them six wings, not stretched upwards (as those whom Ezekiel saw, Eze. 1:11), but:

1. Four were made use of for a covering, as the wings of a fowl, sitting, are; with the two upper wings, next to the head, they covered their faces, and with the two lowest wings they covered their feet, or lower parts. This bespeaks their great humility and reverence in their attendance upon God, for he is greatly feared in the assembly of those saints (Ps. 89:7). They not only cover their feet, those members of the body which are less honorable (1Co. 12:23), but even their faces. Though angel's faces, doubtless, are much fairer than those of the children of men (Acts 6:15), yet in the presence of God, they cover them, because they cannot bear the dazzling luster of the divine glory, and because, being conscious of an infinite distance from the divine perfection, they are ashamed to show their faces before the holy God, who charges even his angels with folly if they should offer to vie with him (Job 4:18). If angels be thus reverent in their attendance on God, with what godly fear should we approach his throne! Else we do not the will of God as the angels do it. Yet Moses, when he went into the mount with God, took the veil from off his face (see 2Co. 3:18).
2. Two were made use of for flight; when they are sent on God's errands they fly swiftly (Dan. 9:21), more swiftly with their own wings than if they flew on the wings of the wind. This teaches us to do the work of God with cheerfulness and expedition. Do angels come upon the wing from heaven to earth, to minister for our good, and shall not we soar upon the wing from earth to heaven, to share with them in their glory (Luke 20:36)?