fatima 3 Although Mary had explained to them that they themselves would go to heaven, the vision of hell had brought the children in a shock. They began to live a heroic life of penitence, prayer and sacrifice.

We, older people, don't possess the innocence of children any more, but have been entangled in a web of sin and guilt.
But if we go to Mary as her children, we can improve ourselves with little steps, falling and rising again. Eventually, she shall lead us to Jesus.