We are all prone to complaining at times.  Maybe something didn't go the way we thought it should.  Maybe someone lets us down.  The book of Numbers is full of times that God's people complained.  In a sermon called "Grumbling and Complaining," we be look at Numbers chapters 11 and 12.  These chapters are the beginning of the 2nd main section in the book of Numbers.  The Israelites begin to walk through the wilderness again to the promised land.  At the end of chapter 10 it looks like things are going great, but right away in chapter 11 they start complaining.  We see why they complain and we are challenged to look at our own bad attitudes.  At the heart of all complaining is dissatisfaction with God and his goodness.  But the greatest way to fight an attitude of grumbling and complaining is to realize the incredible goodness that we have in Jesus Christ.  I encourage you to read Numbers chapters 11 and 12 in preparation for this sermon.