'On Earth' in the Bible

Dear children, it is [now] the last hour [i.e., the final period of God's dealing with people on earth], and since you have heard that an antichrist [i.e., a person who is against Christ] is coming, even now [you should be aware that] many antichrists have [already] come. This is [one way] we know that this is the last hour.

But, you [should] know that Christ appeared [on earth] to take away [our] sins, and that there is no sin in His life [See II Cor. 5:21].

The sinner is a child of the Evil One; for the Evil One has been a sinner from the first. And the Son of God was seen on earth so that he might put an end to the works of the Evil One.

For there are three that testify on earth, the Spirit, and the water, and the blood, and these three agree in one.

And there are three witnesses on earth the Spirit, the water, and the blood and these three are one.