QUESTIONS ON PARASHAT KORACH

1. "Korach separated himself . . . with Dathan and Aviram . . . with two hundred and fifty men from Israel . . . they gathered together against Moses and Aaron." (Numbers 16:1-3)

Commenting on this incident, Pirkei Avot 5:17 says, "Any argument that is for the sake of heaven will endure; but one that is not for the sake of heaven will not endure." What is the difference between an argument that is for the sake of heaven and one that is not?   How can we tell the difference? How do we know that Korach's dispute with Moses was not for the sake Heaven? 

2. In Numbers 16:5 Moses declares to Korach and all his followers, "In the morning the LORD will show who belongs to him and who is holy, and he will have that person come near him. The person God chooses God will bring near." Why did Moses want to wait until morning to deal with Korach and his followers?  How does God clarify to all of Israel whose side God is on?