Four things on earth are small,
yet they are extremely wise:

“When a man steals an ox or a sheep and butchers it or sells it, he must repay five cattle for the ox or four sheep for the sheep.

Four huge beasts came up from the sea, each different from the other.

‘These huge beasts, four in number, are four kings who will rise from the earth.

The form of four living creatures came from it. And this was their appearance: They had human form, but each of them had four faces and four wings. Their legs were straight, and the soles of their feet were like the hooves of a calf, sparkling like the gleam of polished bronze. read more.
They had human hands under their wings on their four sides. All four of them had faces and wings. Their wings were touching. The creatures did not turn as they moved; each one went straight ahead. The form of each of their faces was that of a man, and each of the four had the face of a lion on the right, the face of an ox on the left, and the face of an eagle. That is what their faces were like. Their wings were spread upward; each had two wings touching that of another and two wings covering its body. Each creature went straight ahead. Wherever the Spirit wanted to go, they went without turning as they moved. The form of the living creatures was like the appearance of burning coals of fire and torches. Fire was moving back and forth between the living creatures; it was bright, with lightning coming out of it. The creatures were darting back and forth like flashes of lightning. When I looked at the living creatures, there was one wheel on the ground beside each creature that had four faces. The appearance of the wheels and their craftsmanship was like the gleam of beryl, and all four had the same form. Their appearance and craftsmanship was like a wheel within a wheel. When they moved, they went in any of the four directions, without pivoting as they moved. Their rims were large and frightening. Each of their four rims were full of eyes all around.

Something like a sea of glass, similar to crystal, was also before the throne. Four living creatures covered with eyes in front and in back were in the middle and around the throne.

Each of the four living creatures had six wings; they were covered with eyes around and inside. Day and night they never stop, saying:

Holy, holy, holy,
Lord God, the Almighty,
who was, who is, and who is coming.

Then I saw One like a slaughtered lamb standing between the throne and the four living creatures and among the elders. He had seven horns and seven eyes, which are the seven spirits of God sent into all the earth.

When He took the scroll, the four living creatures and the 24 elders fell down before the Lamb. Each one had a harp and gold bowls filled with incense, which are the prayers of the saints.

Then I saw the Lamb open one of the seven seals, and I heard one of the four living creatures say with a voice like thunder, “Come!”

Then I heard something like a voice among the four living creatures say, “A quart of wheat for a denarius, and three quarts of barley for a denarius—but do not harm the olive oil and the wine.”

They sang a new song before the throne and before the four living creatures and the elders, but no one could learn the song except the 144,000 who had been redeemed from the earth.

One of the four living creatures gave the seven angels seven gold bowls filled with the wrath of God who lives forever and ever.

Then the 24 elders and the four living creatures fell down and worshiped God, who is seated on the throne, saying:

Amen! Hallelujah!