For I know that, after my death, you will do wickedly, and will quickly turn aside form the way that I have commanded you: and evils shall come upon you in the latter times, when you shall do evil in the sight of the Lord, to provoke him by the works of your hands.
Deuteronomy 31:27 For I know thy obstinacy, and thy most stiff neck. While I am yet living, and going in with you, you have always been rebellious against the Lord: how much more when I shall be dead?
Deuteronomy 31:28 Gather unto me all the ancients of your tribes, and your doctors, and I will speak these words in their hearing, and will call heaven and earth to witness against them.
Deuteronomy 31:29 For I know that, after my death, you will do wickedly, and will quickly turn aside form the way that I have commanded you: and evils shall come upon you in the latter times, when you shall do evil in the sight of the Lord, to provoke him by the works of your hands.
Deuteronomy 31:30 Moses therefore spoke, in the hearing of the whole assembly of Israel, the words of this canticle, and finished it even to the end.
The verse centers on "after", "death", "wickedly", "quickly", "turn", "aside", "form", and "commanded". It is saying that the verse draws attention to "after" and "death", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 28's "Gather unto me all the ancients of..." into verse 30's "Moses therefore spoke in the hearing of...", so "after" and "death" belong inside that flow. In Deuteronomy context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "after" and "death" with trust shaped by these words, not by a vague optimism outside the passage.