Two
The number "two" has two different meanings in the Bible. In most cases "two" indicates a joining together or unification. This is easy to see if we consider the conflicts we tend to have between our "hearts" and our "heads" -- between what we want and what we know. Our "hearts" tell us that we want pie with ice cream for dinner; our "heads" tell us we should have grilled chicken and salad. If we can bring those two together and actually want what's good for us, we'll be pretty happy. We're built that way -- with our emotions balanced against our intellect -- because the Lord is built that way. His essence is love itself, or Divine Love, the source of all caring, emotion and energy. It is expressed as Divine Wisdom, which gives form to that love and puts it to work, and is the source of all knowledge and reasoning. In His case the two aspects are always in conjunction, always in harmony. It's easy also to see how that duality is reflected throughout creation: plants and animals, food and drink, silver and gold. Most importantly, it's reflected in the two genders, with women representing love and men representing wisdom. That's the underlying reason why conjunction in marriage is such a holy thing. So when "two" is used in the Bible to indicate some sort of pairing or unity, it means a joining together. In rare cases, however, "two" is used more purely as a number. In these cases it stands for a profane or unholy state that comes before a holy one. This is because "three" represents a state of holiness and completion (Jesus, for instance, rose from the tomb on the third day), and "two" represents the state just before it.
Leviticus 18:1-18
2
"Speak to the children of Israel, and say to them, 'I am Yahweh your God.
3
You shall not do as they do in the land of Egypt, where you lived: and you shall not do as they do in the land of Canaan, where I am bringing you; neither shall you walk in their statutes.
4
You shall do my ordinances, and you shall keep my statutes, and walk in them: I am Yahweh your God.
5
You shall therefore keep my statutes and my ordinances; which if a man does, he shall live in them: I am Yahweh.
6
"'None of you shall approach anyone who are his close relatives, to uncover their nakedness: I am Yahweh.
7
"'You shall not uncover the nakedness of your father, nor the nakedness of your mother: she is your mother. You shall not uncover her nakedness.
8
"'You shall not uncover the nakedness of your father's wife: it is your father's nakedness.
9
"'You shall not uncover the nakedness of your sister, the daughter of your father, or the daughter of your mother, whether born at home, or born abroad.
10
"'You shall not uncover the nakedness of your son's daughter, or of your daughter's daughter, even their nakedness: for theirs is your own nakedness.
11
"'You shall not uncover the nakedness of your father's wife's daughter, conceived by your father, since she is your sister.
12
"'You shall not uncover the nakedness of your father's sister: she is your father's near kinswoman.
13
"'You shall not uncover the nakedness of your mother's sister: for she is your mother's near kinswoman.
14
"'You shall not uncover the nakedness of your father's brother, you shall not approach his wife: she is your aunt.
15
"'You shall not uncover the nakedness of your daughter-in-law: she is your son's wife. You shall not uncover her nakedness.
16
"'You shall not uncover the nakedness of your brother's wife: it is your brother's nakedness.
17
"'You shall not uncover the nakedness of a woman and her daughter. You shall not take her son's daughter, or her daughter's daughter, to uncover her nakedness; they are near kinswomen: it is wickedness.
18
"'You shall not take a wife to her sister, to be a rival, to uncover her nakedness, while her sister is yet alive.
