The ever more youthful Pope included this in his address to German seminarians:
"We all know that Saint Peter said: “Always be prepared to make a defence to any one who calls you to account for the hope that is in you” (1 Pet 3:15). Our world today is a rationalist and thoroughly scientific world, albeit often somewhat pseudo-scientific. But this scientific spirit, this spirit of understanding, explaining, know-how, rejection of the irrational, is dominant in our time. There is a good side to this, even if it often conceals much arrogance and nonsense. The faith is not a parallel world of feelings that we can still afford to hold on to, rather it is the key that encompasses everything, gives it meaning, interprets it and also provides its inner ethical orientation: making clear that it is to be understood and lived as tending towards God and proceeding from God. Therefore it is important to be informed and to understand, to have an open mind, to learn. Naturally in twenty years’ time, some quite different philosophical theories will be fashionable from those of today: when I think what counted as the highest, most modern philosophical fashion in our day, and how totally forgotten it is now ... still, learning these things is not in vain, for there will be some enduring insights among them. And most of all, this is how we learn to judge, to think through an idea – and to do so critically – and to ensure that in this thinking the light of God will serve to enlighten us and will not be extinguished. Studying is essential: only thus can we stand firm in these times and proclaim within them the reason for our faith. And it is essential that we study critically – because we know that tomorrow someone else will have something else to say – while being alert, open and humble as we study, so that our studying is always with the Lord, before the Lord, and for him."
Imagine being 23 or 24 and being given this as your marching orders!