Gaudium et Spes on providing youth with reasons for hope

Following on the tales of yesterday's post, I found this little gem from Gaudium et Spes (the Catholic "Pastoral Constitution on the Church in the Modern World"). Written in 1975, it seems the bishops at the 2nd Vatican Council at least had a clue about what the next generation needed:

"We can justly consider that the future of humanity lies in the hands of those who are strong enough to provide coming generations with reasons for living and hoping." - Gaudium et Spes

What are the "reasons for living and hoping" that the church must provide to young people today? How is the church of today failing in this task? In what ways do you see the church succeeding?