Travelling Light: Releasing the Burdens You Were Never Intended to Bear (2001)
“Dear young people: What will you leave to the next generation? Are you building your lives on firm foundations? Are you living in a way that opens a space for the Spirit in the midst of a world that wants to forget God, or even rejects him in the name of a falsely-conceived freedom? How are you using the gifts you have been given, the 'power' that the Holy Spirit is even now prepared to release within you?”
2008, Closing Mass (19 July 2008)
Help us to complete the source, original and additional information
Pope Benedict XVI 117
265th Pope of the Catholic Church 1927Related quotes
                                        
                                         “Ideals of College” http://books.google.com/books?id=_VYEIml1cAkC&pg=PA15&dq=%22You+are+not+here+merely%22, Swarthmore (25 October 1913) 
1910s
                                    
                                        
                                        Chap. 17 : Seize the Historical Moment 
The Laws of Human Nature (2018)
                                    
                                        
                                        GWU interview (1997) 
Context: You know, you have to really decide where you want to live: if you want to live in the jungle or in the zoo. Because if you want the beauty, if you want freedom, the jungle is... that's your world. But you're in danger there, you have to live with snakes, sharks, tigers, skunks, you know, mosquitoes, leeches. You want to be safe, you have to live in the zoo. You are protected. You know, if you are a lamb, the tiger will not attack you. You know, you'll get a little bit something to eat every day; that's fine. You have to work hard, but you live behind the bars, and what's wonderful — you live there behind the bars and you dream about the beauty of the jungle. Now what happened was that the bars opened, and everybody runs after the dream. And suddenly, well, yeah, it's beautiful — yes, I am free to go wherever I want, do whatever I want, but where do I want to go? Oh, my God, and here is a tiger and here's a snake. Oh, oh, and people have a tendency to, you know, back. And you will be surprised how many people prefer to live in the zoo; they are not ready to pay for the freedom; they think that freedom should be, you know, for free, even for granted, which never is, never is.
                                    
                                        
                                        No printed sources exist for this prior to 2009, and this seems to have been an attribution which arose on the internet, as indicated by web searches and rationales provided at  "Marcus Aurelius and source checking" at Three Shouts on a Hilltop (14 June 2011) http://threeshoutsonahilltop.blogspot.com/2011/06/marcus-aurelius-and-source-checking.html 
This quote may be a paraphrase of Meditations, Book II: 
Since it is possible that thou mayest depart from life this very moment, regulate every act and thought accordingly.
But to go away from among men, if there are gods, is not a thing to be afraid of, for the gods will not involve thee in evil;
but if indeed they do not exist, or if they have no concern about human affairs, what is it to me to live in a universe devoid of gods or devoid of Providence?
But Gods there are, undoubtedly, and they regard human affairs; and have put it wholly in our power, that we should not fall into what is truly evil 
Misattributed