Moses reminds the Israelites that it was God that had cared for them throughout the 40 years in the wilderness. He provided them with food, ensured their clothing didn’t wear out and their feet didn’t swell. He was giving the Israelites the land of Canaan because of the wickedness of the current inhabitants, not the righteousness of the Israelites.
This is a good lesson for us to remember. God hasn’t offered us salvation because of anything we’ve done. It is a gift, offered to us just as Canaan was offered to the Israelites. We’re constantly cared for and provided for, offered an incredible hope. We are among those “who have not seen and yet have believed” in the work that Christ did in order for us to have this hope. It is up to us to respond to Jesus’ invitation to “follow me”, confident in the grace of God, trusting in His care, reflecting His glory to those around us.