Names are important. It is difficult for us to conceive of things apart from their names. The many different names for God in the Bible describe and demonstrate His character.
While the Jews were subject to various food laws, forbidding to eat several types of food (e.g. pork), the Christian is under no such restriction today.
The birthright was the natural privilege of the firstborn son. Receiving the birthright, the firstborn would become the head of the family, and would have charge of the family, including the family property.
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