“Wicked men will be wiped out, but those who rely on the Lord are the ones who will possess the land.”
Man must do his part: rely on the Lord, rather than attempt to make things happen. (Think Abraham and Sarah.) God will do his part: bless and fulfill the terms of the covenant.
To inherit the earth, or possess the land, is to receive the full promise of God to his people. To receive it, the question is: How much do we rely on the Lord?