Entering Into The Lord's Rest

What does it mean to enter into the Lord's rest?
The Lord's rest seems to be such a peaceful place to be. I think it means staying in the good graces of God. It is so helpful to us as members of the church to have the Holy Ghost with us to whisper what we need to do to be happy. If we provoke God like the ungratefulness of the Egyptian slaves after 40 years in the wilderness, then we will not be worthy to enter into the Lord's rest. If we refuse to obey, or deliberately disobey the commandments, then we will hold err with Heavenly Father, and will not be able to enter into His rest.