I couldn't help but think about Alma the Elder. As a parent, it must have been difficult to watch your son not only be an unbeliever, but to intentionally preach against what you know is true. I also would have been praying every day for my son to come back and realize the error of his ways. How much joy he must have felt when his son finally came back to the gospel.
I hope that I never have to experience that with my children. But I also hope that if I do, I will be able to have the same amount of faith as Alma the Elder.