English to Spanish Art/Literary Religion 19th century text

Perhaps there are few dispositions which require more judicious, firm, and steady management, in a child, than that which is often ranked under obstinacy or stubbornness. There is certainly no fault, which, if neglected, or allowed to gain strength, is more likely to bring down the heart of a parent with sorrow to the grave, and to insure to the child a youth and manhood of wretchedness. It 'grows with the growth, and strengthens with the strength.'