“Progress, in the sense of acquisition, is something; but progress in the sense of being, is a great deal more. To grow higher, deeper, wider, as the years go on; to conquer difficulties, and acquire more and more power; to feel all one's faculties unfolding, and truth descending into the soul, — this makes life worth living.”

Source: The Book of Disquiet

Ch. 21 : Conclusion http://www.wealthandwant.com/HG/SP/SP22_Conclusion.htm
Social Problems (1883)
Context: More is given to us than to any people at any time before; and, therefore, more is required of us. We have made, and still are making, enormous advances on material lines. It is necessary that we commensurately advance on moral lines. Civilization, as it progresses, requires a higher conscience, a keener sense of justice, a warmer brotherhood, a wider, loftier, truer public spirit. Falling these, civilization must pass into destruction. It cannot be maintained on the ethics of savagery. For civilization knits men more and more closely together, and constantly tends to subordinate the individual to the whole, and to make more and more important social conditions.

The Extasy, line 64

Source: The Unabridged Journals of Sylvia Plath

Introduction to Truth and Progress: Philosophical Papers, Volume 3 (1998).

Remarks after the Solvay Conference (1927)
Context: In mathematics we can take our inner distance from the content of our statements. In the final analysis mathematics is a mental game that we can play or not play as we choose. Religion, on the other hand, deals with ourselves, with our life and death; its promises are meant to govern our actions and thus, at least indirectly, our very existence. We cannot just look at them impassively from the outside. Moreover, our attitude to religious questions cannot be separated from our attitude to society. Even if religion arose as the spiritual structure of a particular human society, it is arguable whether it has remained the strongest social molding force through history, or whether society, once formed, develops new spiritual structures and adapts them to its particular level of knowledge. Nowadays, the individual seems to be able to choose the spiritual framework of his thoughts and actions quite freely, and this freedom reflects the fact that the boundaries between the various cultures and societies are beginning to become more fluid. But even when an individual tries to attain the greatest possible degree of independence, he will still be swayed by the existing spiritual structures — consciously or unconsciously. For he, too, must be able to speak of life and death and the human condition to other members of the society in which he's chosen to live; he must educate his children according to the norms of that society, fit into its life. Epistemological sophistries cannot possibly help him attain these ends. Here, too, the relationship between critical thought about the spiritual content of a given religion and action based on the deliberate acceptance of that content is complementary. And such acceptance, if consciously arrived at, fills the individual with strength of purpose, helps him to overcome doubts and, if he has to suffer, provides him with the kind of solace that only a sense of being sheltered under an all-embracing roof can grant. In that sense, religion helps to make social life more harmonious; its most important task is to remind us, in the language of pictures and parables, of the wider framework within which our life is set.

Source: Program On Human Effectiveness, 1996, https://web.stanford.edu/dept/SUL/library/extra4/sloan/mousesite/Archive/Post68/PrHumanEffectiveness.html

In the Puppet Theatre: Roof Gardens, Feathers and Human Sacrifice (p. 87)
The Soul of the Marionette: A Short Enquiry into Human Freedom (2015)