Claim. Because of his second sin at the rock, Moses was excluded from Canaan and replaced by Joshua, and the original “external Israelites” born in Egypt perished in the wilderness while the “internal Israelites” — those born during the wilderness course who drank from the water-rock — entered Canaan under Joshua’s leadership.
Elaboration. Two replacements happened simultaneously, both following the replacement pattern at national scope (dp-2-the-providence-of-restoration-under-the-leadership-of-moses §2.2.3).
Central-figure replacement. Although Moses had laid the third foundation of faith through his unwavering Tabernacle devotion across the forty-year wandering, his rock-striking failure bound him to die at Moab. God commissioned Joshua: “Take Joshua… lay your hand upon him… You shall invest him with some of your authority” (Num 27:18-20). Joshua had distinguished himself by remaining faithful during the forty-day spy mission and had since carried the foundation for the Tabernacle when even Moses’s faith faltered. By inheriting the central-figure mission and entering Canaan as Moses could not, Joshua prefigured Christ at the Second Advent, who would inherit Jesus’s unfinished mission.
People-level replacement. All adult Israelites born in Egypt — the “external Israelites” — perished except Joshua and Caleb (Num 14:29-30). Their children, the “internal Israelites” born in the wilderness during the years of drinking from the rock and honoring the Tabernacle, inherited the entry. The internal/external split marks the difference between those formed under Satan’s claim and those formed under the rock-symbolized Christ’s grace.
The doctrine has the structural shape: when central figures fail, both the figure and his generation may be replaced — but the providential goal continues through whoever has remained faithful. The replacement is not arbitrary divine selection but earned by demonstrated indemnity-condition fidelity.