'Beast' in the Bible

Let his heart be changed from that of a man, and the heart of a beast be given to him; and let seven times go by him.

And I saw another beast, like a bear, and it was lifted up on one side, and three side-bones were in its mouth, between its teeth: and they said to it, Up! take much flesh.

After this I saw another beast, like a leopard, which had on its back four wings like those of a bird; and the beast had four heads, and the power of a ruler was given to it.

After this, in my vision of the night, I saw a fourth beast, a thing causing fear and very troubling, full of power and very strong; and it had great iron teeth: it took its food, crushing some of it to bits and stamping down the rest with its feet: it was different from all the beasts before it; and it had ten horns.

Then I saw--because of the voice of the great words which the horn said--I saw till the beast was put to death, and its body was given to destruction, and the beast was given to the burning of fire.

Then it was my desire to have certain knowledge about the fourth beast, which was different from all the others, a cause of great fear, whose teeth were of iron and his nails of brass; who took his food, crushing some of it to bits and stamping on the rest with his feet;

This is what he said: The fourth beast is a fourth kingdom which will come on earth, different from all the kingdoms, and it will overcome all the earth, crushing it down and smashing it.