Parsha: Vayikra, "Catholic Israel"

"When the entire congregation errs..." (Leviticus 4:13), Hazal equates the following :

• "The entire congregation errs" ==> The Sanhedrin errs.

Now, In the absence of any Sanhedrin it makes sense to go back to the original text. It now follows  to imply the converse:

• The Sanhedrin ==> The entire Congregation of Israel.

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Illustration:
The United States' of America's Congress, or the Canadian Parliament represent all of the the people. In the absence of such a representative body, then all of the people represent themselves.

Shalom,
RRW