Because the bible tells you so?

[Secular Elf]

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This, to me, seems like the flavor of that particular month. The idea of the abstract was a gradual invention and ability of the human mind. Consider how the earliest religions started with worshiping tangible things like animals or the son/moon. This evolved to more fantastic ideas of half-human/half-animals, which evolved to become completely abstract ideas of what a god is.

And I can't seem to ignore that, even though an idol-less god was the original plan, man couldn't help but build statues of Jesus or to commission paintings of God himself. Christianity is filled to the brim with imagery, even though, as you've said, god reminds us that he is invisible. Man, uhhhh uh uhhhh finds a way.

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Did the Greeks believe that statues were their actual deities or did they use them the same way that Christians use paintings and carvings of Jesus and other religious figures?   The early Hebrews built an ark to house their god and there is imagery of a god in the bible, the burning bush, walking in the garden of Eden and even like a cloud pillar in Exodus. It seems as if the Hebrews concept of god changed with the rest of the world's. 

The concept of carrying gods in arks is from Egypt.  Egypt during the Middle Kingdom (2055-1650 BCE) and New Kingdom (1550-1069 BCE) eras had exercised both political and cultural influence in the Levant area (modern day Sinai north through Israel, Lebanon, and coastal Syria) and maintained control there as part of the Egyptian Empire.  You can see Egyptian influence in Canaanite art of the period.  Current archaeological research indicates that the Hebrews and the Canaanites were culturally indistinct.  So it is not a stretch that certain ideas from Egypt influenced the ancestors of the ancient Israelites.

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2. I didn't encounter this as far as I can recall so I don't have an answer to this. For spoken language it was taught that the tower of babel story where people were tying to build a tower into heaven and god created all the different languages to confuse everyone so they couldn't build the tower.

The Tower of Babel story comes from an original Sumerian myth.

Once upon a time there was no snake, there was no scorpion,

There was no hyena, there was no lion,
There was no wild dog, no wolf,
There was no fear, no terror,
Man had no rival.
In those days, the lands of Subur (and) Hamazi,
Harmony-tongued Sumer, the great land of the decrees of princeship,
Uri, the land having all that is appropriate,
The land Martu, resting in security,
The whole universe, the people in unison
To Enlil in one tongue [spoke].
(Then) Enki, the lord of abundance (whose) commands are trustworthy,
The lord of wisdom, who understands the land,
The leader of the gods,
Endowed with wisdom, the lord of Eridu
Changed the speech in their mouths, [brought] contention into it,
Into the speech of man that (until then) had been one.

--Enmerkar and the Lord of Aratta

The Jews of the Babylonian Exile Period (609-515 BCE) borrowed some themes and myths from the Babylonian religion (who inherited it from the Sumerians through the Akkadians), changed a few names, edited a few storylines, and adapted them and adopted them as their own.