The excerpts below include the final sections of Chapter V, which covers the relationship between science and religion (think John Paul II's Fides et Ratio, if you're familiar with it), and the opening passages of Chapter VI, which discusses conversion of the whole person, here focusing on the call to a new lifestyle.
V. RELIGIONS IN DIALOGUE WITH SCIENCE
199. It cannot be maintained that empirical science provides a complete explanation of life, the interplay of all creatures and the whole of reality. This would be to breach the limits imposed by its own methodology. If we reason only within the confines of [science], little room would be left for aesthetic sensibility, poetry, or even reason's ability to grasp the ultimate meaning and purpose of things. I would add that "religious classics can prove meaningful in every age; they have an enduring power to open new horizons... Is it reasonable and enlightened to dismiss certain writings simply because they arose in the context of religious belief?"....
200. Any technical solution which science claims to offer will be powerless to solve the serious problems of our world if humanity loses its compass, if we lose sight of the great motivations which make it possible for us to live in harmony, to make sacrifices and to treat others well. Believers themselves must constantly feel challenged to live in a way consonant with their faith and not to contradict it by their actions.... If a mistaken understanding of our own principles has at times led us to justify mistreating nature, to exercise tyranny over creation, to engage in war, injustice and acts of violence, we believers should acknowledge that by so doing we were not faithful to the treasures of wisdom which we have been called to protect and preserve.... By constantly returning to their sources, religions will be better equipped to respond to today's needs.
201. The majority of people living on our planet profess to be believers. This should spur religions to dialogue among themselves for the sake of protecting nature, defending the poor, and building networks of respect and fraternity. Dialogue among the various sciences is likewise needed, since each can tend to become enclosed in its own language, while specialization leads to a certain isolation and the absolutization of its own field of knowledge.... An open and respectful dialogue is also needed between the various ecological movements, among which ideological conflicts are not infrequently encountered....
ECOLOGICAL EDUCATION AND SPIRITUALITY
202. Many things have to change course, but it is we human beings above all who need to change. We lack an awareness of our common origin, of our mutual belonging, and of a future to be shared with everyone. This basic awareness would enable the development of new convictions, attitudes and forms of life. A great cultural, spiritual and educational challenge stands before us, and it will demand that we set out on the long path of renewal.
I. TOWARDS A NEW LIFESTYLE
203. Since the market tends to promote extreme consumerism in an effort to sell its products, people can easily get caught up in a whirlwind of needless buying and spending. Compulsive consumerism is one example of how the techno-economic paradigm affects individuals.... This paradigm leads people to believe that they are free as long as they have the supposed freedom to consume.... Amid this confusion, postmodern humanity has not yet achieved a new self-awareness capable of offering guidance and direction, and this lack of identity is a source of anxiety. We have too many means and only a few insubstantial ends.
204. The current global situation engenders a feeling of instability and uncertainty, which in turn becomes "a seedbed for collective selfishness".... The emptier a person's heart is, the more he or she needs things to buy, own and consume. It becomes almost impossible to accept the limits imposed by reality.... As these attitudes become more widespread, social norms are respected only to the extent that they do not clash with personal needs.... Obsession with a consumerist lifestyle, above all when few people are capable of maintaining it, can only lead to violence and mutual destruction.
205. Yet all is not lost. Human beings, while capable of the worst, are also capable of rising above themselves, choosing again what is good, and making a new start, despite their mental and social conditioning. We are able to take an honest look at ourselves, to acknowledge our deep dissatisfaction, and to embark on new paths to authentic freedom. No system can completely suppress our openness to what is good, true and beautiful, or our God-given ability to respond to his grace at work deep in our hearts. I appeal to everyone throughout the world not to forget this dignity which is ours. No one has the right to take it from us.
206. A change in lifestyle could bring healthy pressure to bear on those who wield political, economic and social power. This is what consumer movements accomplish by boycotting certain products.... When social pressure affects their earnings, businesses clearly have to find ways to produce differently. This shows us the great need for a sense of social responsibility on the part of consumers. "Purchasing is always a moral - and not simply economic - act"....
207. The Earth Charter [of 2000] asked us to leave behind a period of self-destruction and make a new start, but we have not as yet developed a universal awareness needed to achieve this. Here, I would echo that courageous challenge: "As never before in history, common destiny beckons us to seek a new beginning... Let ours be a time remembered for the awakening of a new reverence for life, the firm resolve to achieve sustainability, the quickening of the struggle for justice and peace, and the joyful celebration of life"....
 Cf. Encyclical Letter Lumen Fidei (29 June 2013), 34.
 Apostolic Exhortation Evangelii Gaudium (24 November 2013), 256.
 JOHN PAUL II, Message for the 1990 World Day of Peace, 1.
 BENEDICT XVI, Encyclical Letter Caritas in Veritate (29 June 2009), 66.
 Earth Charter, The Hague (29 June 2000).