Amen! Isn't this the prayer of every parent as they raise their children in a secular world?
Doubt is inherent in our fallen human nature. But ultimately, God willing, that doubt will lead to a deeper understanding of God's grace --
"These things I have spoken unto you, that in me ye might have peace. In the world ye shall have tribulation: but be of good cheer; I have overcome the world." -- John 16:33