Believing in Jesus or Believing on Jesus?

If we read the KJV or a KJV-type Bible version, we find scriptures that use the preposition on, and not in, concerning faith or believing.
One example is Acts 16:31. When the keeper of the prison asked Paul and Silas, what must he do to be saved, their answer was: “Believe on the Lord Jesus Christ, and you shall be saved, and your house.” (KJV2000)
So what is right: in or on?

The Greek text uses the preposition epi. It is used in several ways. With different cases, it has different meanings like over, upon, towards, over, on, etc. Using on, like in the King James Version, is an appropriate translation. It is closer to the Greek than the preposition in.

The situation, however, is this: there are differences between languages, and languages go through changes. At the time of the translation of the King James Version, believing “on” Jesus could have been a good translation, and it may have been the accepted form. But today we mean the same by the phrase: believing “in” Jesus. That’s how we speak today, and practically there is no difference in the meaning.

So the truth remains. This is what we have to do:

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