It’s bad. Don’t do it.
Three confusing words in the Old Testament, all dealing with how we can be close to God (or not).
In general, members of the tribe of Levi (one of the 12 clans of Israel), and the only tribe with a specific mission – Levites were either priests or assistants to the priests.
Not the Catholic kind; we’re talking about men in the Old Testament who offered sacrifices in the temple and tabernacle.
It’s YHWH, an acronym of sorts.
Satan (Job 1:6), the serpent (Gen 3:1), the “prince of the power of the air” (Eph 2:2), “the ruler of this world” (John 12:31), “the tempter” (1Th 3:5).
Not eating for some reason. In the Old Testament, the examples I see are all negative, basically – it’s to repent of sin or mourn a death. In the New Testament, it seems more of a deep devotion to God – for Jews and Christians.
Leviticus 23 describes seven feasts (festivals) for Jews to observe every year. They are Jewish holidays – as in “time off” but also the literal idea of “holy days.”
An altar is for sacrifices. It’s not where people get married or “left at the altar” – not in the Bible. An altar is for sacrifices.
Leviticus 19:18, “you shall love your neighbor as yourself: I am the LORD.” Did you expect this to be a lesson from the Old Testament? And it’s not just this one verse; the Torah and prophets are riddled with commands about this.