Aliya Summary: Moshe warned the Israelites not to be tempted by the idolatrous lifestyles of the Egyptians and the other sundry nations through which they had passed in the course of their travels. Moshe warned of the dire consequences which will befall the individual, family, or tribe, which would forsake their covenant with G‑d. This section concludes with the concept of communal responsibility for not appropriately punishing individual sinners.
The phrase describing what we would today refer to as a “rotten apple” is “Shoresh Poreh Rosh V’laana”, literally a poisonous root of gall and wormwood. The initial letters of this phrase rearrange to spell SHOFAR, the antidote to this negative facet of Jewish life. The Shofar must awaken the one who stray and start him on the road of T’shuva.