Uncomplicated faith.
Of course she is right. We need not be unduly concerned about our young one's walk if they appear to be making slow progress. Sometimes our children will take great strides in Christian grace, compassion and zeal whilst at other time they will meander through quietly finding their way amidst the darkness of peer pressure and temptation.
It is our part to seek, His to grant what we ask; ours to make a beginning, His to bring it to completion; ours to offer what we can, His to finish what we cannot.
—Jerome (c. 345–419), biblical scholar and Latin Bible translator
Just like us, our teens and children will have peaks and troughs in their walk - we must continue to encourage, build up, nurture and pray for our children so 'that in it's season we will reap a harvest.'