...continued.
Is Final Salvation Free or Contingent upon Obeying Commandments?
Does willful sin separate the elect from God?
If you keep sinning after you are saved are you still saved?
When believers are confused about the purpose of the Cross, they end up asking questions like these.
On the one hand, preachers teach that the work of Christ is sufficient. On the other side, we have the verses that deal with judgment, the righteous to a judgment of resurrection, and the lazy to a judgment of wrath.
A good way to think about it is to consider that the sufficiency is with regard to empowering believers, so that they can be how God fulfills His promise to Abraham, not how God admits them into heaven. Else the promise to Abraham is left hanging in the air.
The land is an important element in the process of salvation. When Israel is carried away into captivity in Babylon, they are impotent, unable to sing the Lord's song in a strange land. They must be IN the Promised Land, rest, a type of Christ, to BE Israel. The problem is existential. Equally important, whoever lives in the Land must serve God loyally. When the King of Assyria brought in settlers from Babylon to harness the Land, God sent lions that killed them, because they did not know how God was to be approached. No wonder the rest of Jerusalem feared to join Peter:
Acts of the Apostles 5
13No one else dared join them, even though they were highly regarded by the people.
How different from the easy believism taught in the church today.