Rev. 3:1 "And unto the angel of the church in Sardis write; These things saith he that hath the seven Spirits of God, and the seven stars; I know thy works, that thou hast a name that thou livest, and art dead."

Rev. 4:5 "And out of the throne proceeded lightnings and thunderings and voices: and there were seven lamps of fire burning before the throne, which are the seven Spirits of God."

Rev. 5:6 "And I beheld, and, lo, in the midst of the throne and of the four beasts, and in the midst of the elders, stood a Lamb as it had been slain, having seven horns and seven eyes, which are the seven Spirits of God sent forth into all the earth."

From the above we learn that these 7 spirits of God are also described as:
Seven lamps of fire burning before the throne, and
A Lamb as it had been slain, having seven horns and seven eyes.