Deuteronomy 11:8

8 "Keep every command I am giving you today, so that you may have the strength to cross into and possess the land you are to inherit,

Deuteronomy 11:8 Meaning and Commentary

Deuteronomy 11:8

Therefore shall you keep all the commandments which I command
you this day
For the reasons before suggested, as well as for what follow:

that ye may be strong;
healthful in body, and courageous in mind, for sin tends to weaken both; whereas observance of the commands of God contributes to the health and strength of the body, and the rigour of the mind; both which were necessary to the present expedition they were going upon:

and go in and possess the land whither ye go to possess it;
the land of Canaan, they were marching towards in order to possess it; and nothing would more inspire them with courage, and cause them to enter it manfully without fear of their enemies, than obedience to the commands of God; whose presence being promised them on that account, they might expect it, and so had nothing to fear from the inhabitants of the land.

Deuteronomy 11:8 In-Context

6 and what He did to Dathan and Abiram, the sons of Eliab the Reubenite, when in the middle of the whole Israelite [camp] the earth opened its mouth and swallowed them, their households, their tents, and every living thing with them.
7 Your [own] eyes have seen every great work the Lord has done.
8 "Keep every command I am giving you today, so that you may have the strength to cross into and possess the land you are to inherit,
9 and so that you may live long in the land the Lord swore to your fathers to give them and their descendants, a land flowing with milk and honey.
10 For the land you are entering to possess is not like the land of Egypt, from which you have come, where you sowed your seed and irrigated by hand as in a vegetable garden.
Holman Christian Standard Bible ® Copyright © 2003, 2002, 2000, 1999 by Holman Bible Publishers.  Used by permission.  All rights reserved.