'On Earth' in the Bible

"But you have a few people [there] in Sardis who have not [spiritually] polluted their clothing, and they will walk with me in [robes of] white [i.e., probably now on earth as well as in heaven], for they are worthy.

And no one in heaven, or on earth or under the earth was able to open the book or to look inside of it. [Note: "Under the earth" may refer to the spirit world].

And they called out with a loud voice, "How long, holy and true Master, [will it be] before you judge the people living on earth and take revenge on them for [shedding] our blood?"

And as I looked, I heard an eagle flying in midair, saying in a loud voice, "It is bad, very bad, awful bad for those people who live on earth, because of the sound of the trumpets of the remaining three angels!" [i.e., because of the messages they will deliver].

And locusts swarmed down out of the smoke to earth and they were given power like scorpions on earth have.

And they were told not to harm the grass on earth, or any greenery, or any tree, but only those people who did not have God's seal on their foreheads.

And those people living on the earth will be glad over the death of them [i.e., the two witnesses. See verse 3], and they will celebrate by sending gifts to one another, because these two prophets had tormented those living on earth.

And everyone who lives on earth will worship the beast, [even those] people whose names had not been recorded in the book of life belonging to the Lamb, who was killed [in prospect] from the creation of the world. [Note: This sentence could also read "...not been recorded from the creation of the world in the book of life belonging to the Lamb who was killed"].

[And] by being given [power] to perform these signs in the sight of the [first] beast, he deceived the people on earth. He told them to make a statue to [honor] the [first] beast, who had been wounded by a sword and yet lived [through it].

[At that moment] there were flashes of lightning, [loud] sounds of rolling thunder, and a severe earthquake, worse than any since mankind was on earth; it was a terrible earthquake.

And the blood of the prophets and the saints and all [others] who were killed on earth was found in her."