Is it true that everything changes, and yet everything stays the same?
It does seem to have a general truth, especially over the long term, and in one-direction - when the first "everything" is taken to mean the superficial aspects of daily life and things, which are always changing; but the second "everything" means the fundamental and overall goodness of daily life.
For instance, the design of an entity - whether a car or a constitution, fashions or laws - tends frequently and always to be changing (especially in this age of left-totalitarian bureaucracy), and these changes can be "sold" as improvements; however, these changes do not add-up; they fail to lead to any fundamental improvement in things-in-general (e.g. the totalitarian society of left-totalitarian bureaucracy continues, and indeed solidifies).
What I mean by "one-direction", is that while it is common and easy for surface changes to make life overall and in the long-term worse; this seldom works in the inverse.
It seems difficult and rare for a multitude of superficialities to improve life in a lasting and qualitative fashion.
This is related to the observation that while it is relatively quick, easy and cheap to corrupt people and make them worse (It happens All The Time; and I have seen this qualitative corruption of people more often than not over the past decades; e.g. in relation to my class of people in medicine, science and academia).
On the other side; it is so slow, difficult, and costly of effort to improve people; that I think it fair to say that there is no known method by which it can be done.
To put it differently; people can be made worse passively and unconsciously, simply by their going-along-with the changes of life, passively responding to the incentives towards evil...
But for people to improve, to become better-people; requires in inner, active and conscious change in their attitudes and motivations.
Since getting-worse is unconscious and passive and energy-absorbing; while getting-better is conscious and active and energy-consuming - getting-worse naturally happens more often and more widely.
This, I think, is a reason why well-meaning people so often err in their optimism.
After considerable investment of times and effort, they have been able to reform some evil or injustice, or to introduce some improvement; and the tendency is to regard all such positive steps as accumulating towards a hoped-for positive and general transformation.
For instance; institutions, including churches, may have achieved many little-but-surface improvements - in some objectively-measurable area; such fund-raising, attendance, missionary/ evangelical activity, implementation of one or another scheme...
And these several or many surface changes are mistakenly summated into the optimistic expectation that things are going their way.
The model they believe is that any step in the right direction is of-positive-value; and so long as there are such steps, then things are optimistic.
But, after a while, a step-back and an objective eye reveals that although "everything" changes in the desired directions over the short-medium term; over the medium-long term, fundamental decline continues...
Christian apostasy continues, churches continue to shrink in seriousness and size; faith is rarer and weaker; assimilation to the values of secular-left totalitarianism is increasingly dominant.
However, such is our addiction to institutional optimism, that an objective retrospect seldom happens, and lessons are never learned.
Instead, over and again, some novel strategy is embraced, some new set of optimistic "initiatives" becomes the centre of attention and efforts, and some of these are achieved with superficial success...
And the cycle repeats.
This is how it is with The World, and apparently how it always has been. Even when (perhaps stimulated by a religious revival, or a Good Monarch) there is a genuine positive transformation at the large scale - this cannot be made into a system, and the attempt to so so reveals flaws in the original basis for positive change.
Such that new kinds of corruption emerge, and the benefits are soon dissipated then overwhelmed.
Everything changes, yet everything stays the same?
This is why Jesus Christ did not promise a better world, and did not construct a system for attaining a better world.
He knew that such is impossible in this mortal life, by the very nature of this-world.
But instead Jesus promised something genuinely attainable (thanks to His work): that individual people might, after death, have resurrected eternal life in Heaven.