Though the Jordan was not mentioned in the first attempt to cross into Canaan forty years earlier, we can yet see a picture of what hindered that first generation when we look at the idea of a veil called the Jordan River. Both of the accounts of confronting the Land's entrance while facing a barrier speak of the fears of the flesh which hindered the people from entering. The younger generation, however, learned to fear God more than fear the enemy. They excelled above their parents due to their faith. They would see that veil rent, which formerly blockaded their parents.
Frightened flesh is as a veil .
Whether the veil was fear of giants or fear of a swelling river that overflowed its banks, the same, frightened flesh will block one's progress. That sense exists due to the fact that mankind is not meant to trek through life without higher help. Therefore, much of our unbelief comes from our fear of the inability of the flesh. We consider not God's omnipotence, but look at our fleshly capabilities. And, of course, we recognize that flesh is too weak to conquer enemy territory for us.