Numbers 11 and 12 is mainly concerned with  the ‘attitude of ingratitude’ shown by the people of Israel on their journey through the desert. The people had a mind to complain about the food they had and didn’t have, some blessings others had and the leader (Moses) they all had. Such grumbling was evidence of their lack of trust in the Lord and His gracious gifts. A spirit of grumbling and complaint can still afflict the people of God today, whenever our eyes are off the Lord and His undeserved blessings.