Learn English – How obsolete is the word “overmorrow”

In most languages an informal pronoun is used to address God. In German they use the informal 'du', for example. It's meant to signify a personal relationship with God, as in the way you would talk to your father.

OED says this about bibles specifically:

No difference can be detected between the use of ‘believe in’ and ‘believe on’ in the 16th-cent. versions of the Bible, except that the latter was more frequent; it is now archaic.

While some people may believe that there is a difference, there doesn't appear to be one. "Believe on" isn't something I've ever seen or heard, and it appears to be only used because it appears in some translations of the Bible.

As for usage through history, it wasn't just translations of the Bible, it wasn't just Early Modern English, and it wasn't just those two prepositions.

Old English is very different than Modern English; it used the preposition on, with a very different word order:

Þis hé spræc on Iudea-lande: ðær wæs án eowd of ðam mannum þe on God belyfdon on ðam leodscipe.

This he spake in the land of Juda: there was a fold of men who believed in God in that nation.
_{The Homilies of the Anglo-Saxon Church by Ælfric, translated by Benjamin Thorpe}

Middle English had a lot more variety. I suggest checking out the (free) Middle English Dictionary entry. ME still had some of the weird word order (this word order was only used with on, as far as I can see):

Laban and all his men, That on Mahounde byleved.
_{Sowdon of Babylon}

Some sources, like this one (from ~1225) even mix in and on:

• [...] to bileuen in god.

• Ich bileue on þe holie gost.

And, like I said, there were other prepositions that were used, depending on which meaning. From OED (dagger means obsolete):

• intr. To have confidence or faith in, and consequently to rely on or trust to, a person or (Theol.) a god or the name of a god.

  • With in, on, †into, †unto (rare), †of (rare), †upon.
  • intr. With in, †of (rare), †on, †to (rare). To have confidence in the truth or accuracy of (a statement, doctrine, etc.). In later use also: to have confidence in the genuineness, virtue, value, or efficacy of (a principle, institution, practice, etc.).

There are plenty of examples of these prepositions being used in ME (again, see Middle English Dictionary), but you'll also see a few examples after that. These are from OED's first definition:

• They were al content to leue theyr law and to byleue of Iesu chryst.
  _{The boke of Duke Huon of Burdeux, c1515}

• I byleue vpon god & vpon his feyth.
  _{Werke for Housholders, 1530}

• All that should beleeve on him unto eternall life.
  _{Israels prayer, 1649}

• Our Adversaries will not believe of our Holy Apostle, because they think it Idolatrous to pray to a Creature in the very same manner as to the Creator God.
  _{A confutation of popery, 1701}

• To persuade a savage that it is to his advantage to believe on the Lord Jesus Christ.
  _{Missionary & Anthropology, 1945}

And these are from the other definition:

• They do not well beleeve of the primacy of the Bishop of Rome.
  _{Christianographie, 1630}

• Beleeve lesse to your courage then judgement.
  _{The history of Polexander in five bookes, 1647}

• We must be able to believe on the Churches word, before we have read the holy Scripture.
  _{J. B. Bossuet's Conf. with Mr. Claude, 1687}