They can even learn about faith. Nevertheless, this learning about the Christian faith is very different from learning faith. We can grow in our understanding of faith and not grow in faith. That is, ultimately, faith is not an intellectual exercise. It is so much more than mere belief.
Faith is a much richer word that implies a living relationship.
I depend on her. To have faith in God, then, implies a whole range of ways that one actively relates to God. Faith is a living, dynamic relationship that is more akin to trust than anything else. So when we talk about growth in faith, we're talking about more than growth in understanding. We're talking about growth in relationship.