We will never have a perfect people. Not everyone we teach will listen. Even the Three Nephites, who were promised an eternity without pain or suffering, still hurt for the sins of the people.
It makes me sad.
There ARE plenty who DO listen. Who DO change their lives.
And that happiness is worth everything else.
I would also like to point out that I. Love. My. Kids. Even when I wrestle Isaac all during sacrament meeting and wonder why the heck I bothered going today, there's still Nathan. Who went through the same phase and now sits quietly playing, reading books about Jesus and telling me that he feels good when he follows His teachings.
We're here to have JOY!