The seraphim are a division of angels mentioned twice in the book of Isaiah. The other divisions are the cherubim, archangels, the living creatures, and the common angels. Meaning there are 5 divisions of angels in all.
Seraph is singular. It means The Burning One. And its plural is Seraphim or Seraphims.
Isaiah 6:1-2 has the six-winged seraphim described this way: “1 In the year that king Uzziah died I saw also the Lord sitting upon a throne, high and lifted up, and his train filled the temple. 2 Above it stood the seraphims: each one had six wings; with twain he covered his face, and with twain he covered his feet, and with twain he did fly.”
From verse two, you will see their position in heaven: “Above it stood the seraphims.” They stand right above God’s throne. They have six wings and cannot look at God’s glory. That’s why they cover their faces with two of their wings. Two are used for flying to, of course, carry out their assignments. Guess why they cover their feet with the other two wings, and let us know.
They have hands, too. Let us find out from Isaiah 6:6-7: “6 Then flew one of the seraphims unto me, having a live coal in his hand, which he had taken with the tongs from off the altar: 7 And he laid it upon my mouth, and said, Lo, this hath touched thy lips; and thine iniquity is taken away, and thy sin purged.”
You noticed that one of them had a live coal in his hand, right?
Notice, too, that they are persons as seen in verse 4 and 6. You can see in Isaiah 6:4 that the posts of the door moved at the voice of him that cried. The one that cried was an angel in verse 3 saying, “Holy, holy, holy, is the LORD of hosts: the whole earth is full of his glory.” And we have “in his hand,” the verse 6 says, not “in its hand.”
They are closer to the Father as you may have noticed from the verses.
What is the function of the Seraphim?
Their function is found in Isaiah 6:3: “And one cried unto another, and said, Holy, holy, holy, is the LORD of hosts: the whole earth is full of his glory.”
A seraph is seen here by the Prophet Isaiah cry to another in worship. They worship the Lord constantly. The result of it is what happened in verse 4: “And the posts of the door moved at the voice of him that cried, and the house was filled with smoke.” The foundation where God abides shook when the angel cried. It tells us, Christians, that God moves anytime He is worshipped. Hallelujah!
Read: Corinthians 12:2-4; Isaiah 6:5