In Devarim Moses relates the sin of the spies which caused Israel to delay entering the land for 40 years. The spies were faced with the same problem we all deal with. God and His promises are of heaven but the world is in your face. When faced with immediate problems our hearts will try to keep our focus there instead of on the eternal things of God. That is what Jeremiah means when he says the heart is deceitful. Learning to discern between the immediate and the important is one of the great lessons of this life.
