>>748975
Genesis 8 gives us the best depiction of the Trinity in the OT:
And the Lord appeared to him by the oaks of Mamre, as he sat at the door of his tent in the heat of the day. He lifted up his eyes and looked, and behold, THREE MEN stood in front of him.
5 while I fetch a morsel of bread, that you may refresh yourselves, and after that you may pass on—since you have come to your servant.” So THEY said, “Do as you have said.
9 THEY said to him, “Where is Sarah your wife?” And he said, “She is in the tent.” 10 THE LORD said, “I will surely return
This whole passage embodies God in a “3 as one.” narritive. The 3 figures represent each person of the godhead, but altogether are “The Lord.” It constantly defines the Lord as “he” (singular) and “they” (pluaral). God is 3 persons but one God.
The trinity is also mentioned in Genesis 1 “let us make man in OUR image” (“our” being of the 3 members of the trinity).
We see the Holy Spirit many times in the Davidic psalms, e.g. psalm 51 “take not your holy spirit from me.” David had the spirit. Jesus is also mentioned in the psalms “the stone that the builders rejected became the cornerstone.” This cornersrone (Christ, the cornerstone of the Christian faith) is also seen in Daniel 9 as smashing all of paganism to dust (as we saw happen in history). But Jesus is most wondefully illustrated in Isaiah 53, the auffering servant who will take man’s sins upon himself.
As far as the dietary law, things were first made unclean by God in Leviticus after many many years, indicating this was not always the case. This diet kept the Israelites holy as a temporary check until the messiah came, so as to be an example of Christians in their assignment to keep themselves on a healthy spiritual diet (the fruit of the word).