The Carbon Based vs. the Reality Based Community
Now, I would add that the most important reality one must know in order to accomplish the good is human reality, which automatically implies the divine reality with which we are always in a dialectical relationship.
To put it another way, if one does not know what a human being is -- which naturally includes what a human being is for -- then one's actions on behalf of human beings (either oneself or others, it doesn't matter) will be misguided, ill-considered, and generally grounded in wish or fantasy rather than objectivity, which is to say "the nature of things," or truth.
Think of it this way: in the absence of truth, there is no possibility of good. There are no doubt exceptions to this rule on the micro scale, but on the macro scale of politics, failure to be in conformity with human truth paves the way for the greatest of evils.
For example, every leftist scheme from socialism to fascism to communism begins with an erroneous conception of what a human being is, and then simply draws out the political implications.
Thus, if your anthropology is off, then your political philosophy will run aground -- unless you actually succeed in the monstrous project of making human beings other than what they are, say, a fundamentally material rather than intrinsically spiritual being. As is plain for all to see, this is something the left never stops trying to do. In order for them to succeed, they must literally obliterate Man as he is and was meant to be. Rather, Man must become what the leftist wishes him to be, which is to say, a cog in their statist/collectivist machine.
What is even more sinister is that the half-educated rank-and-foul leftist generally doesn't even know he is doing this, as one cannot know what one doesn't know: for the leftist, the great vertical realm of spirit is the dark void of the "unknown unknown," hence their arrogant confidence in dismissing it (no different from, say, 19th century doctors who dismissed the germ theory on the grounds that they themselves could not possibly be carriers of such "unclean" entities).
Secular humanists follow in the wake of the late medieval nominalists who convinced themselves that the principial realm of transcendental truth was words only, and that only concrete material things were ultimately real. This ousted them from the transcendent and created the split that continues to this day between realists and materialists. (See Richard Weaver's Ideas Have Consequences for the details.)
In turn, this split is very much at the basis of mundane politics, as conservatism may be defined as that philosophy which sees the world as the instantiation of "permanent things," or archetypal ideas that are not subject to change. We do not judge or measure them, because they judge and take the measure of us. We are either evolving toward, or away, from what we are in our deepest nature.
But because the left has exiled itself from human reality, it can never understand the simple truth that the world is disordered because souls are. And then in its ontic backasswardness, it tries to order souls by changing the world, and is always surprised when disordered souls re-exert themselves and spoil their beautiful plans. As someone -- I believe Eliot -- said, they are always dreaming of systems so perfect that no one will need to be good, which is to say, a rightly ordered soul (since souls don't exist for them anyway).
Another critical point: "the good must be loved and made reality" (emphasis mine). In a forthcoming series of posts, I will get into a list I have compiled of what I call the "Top Ten Intrinsic Intellectual Heresies," that is, forms of pseudo-thought that poison the mind at its very root. The doctrine of absolute relativism is perhaps the most obvious one, as it denies the sufficient reason for the existence of mind, which is to say, truth. And freedom is a consequence of truth, so that those who reject truth can never be "free" in any meaningful sense.
But it is not enough that one acknowledge the existence of truth. For in order for truth to be efficacious, it must be loved.
Now, for any human being who is not fundamentally disordered, this statement is self-evident and requires no explanation, for it is both obvious and an everyday phenomenon. Human beings are intrinsically epistemophilic, which means that we simply love to know for its own sake. Indeed, the higher the knowledge, the less pragmatic, until we attain the most useless -- and therefore precious -- knowledge of all.
This is why it is axiomatic that one may be superficially right while being deeply wrong anytime one obliterates the vertical hierarchy that places knowledge in its proper plane, and takes the lower plane for the whole of reality; or, in the words of James Schall, when reason "closes itself off from what is beyond reason." This is not a problem the religious person -- or at least the Christian -- should ever face, as we should love all truth, regardless of the plane. But (vertical) context is everything.
To put it another way, the knowledge of the secular humanist is always merely pragmatic, which means that the gift of the human intellect is bent toward some manmade material end. Naturally this has its place, but if the intellect gives itself over entirely to this lower mode, it literally enters a parallel looniverse split off from the primary one, in a kind of closed and endless loop. Such a person will search for the good where it can never be found, and will never have a sense of peace. This is the Existential Itch that can never be scratched, and which guarantees a lifetime of restless searching for I-know-not-what-because-I-killed-it.
When we harbor a "wrong end," then that end teleologically organizes everything below it. In so doing, we replace the divine attractor with a manmade fantasy, so that we are pulled deeper and deeper into the phase space of fantasy, until it eventually appears not only real but self-evident (cf. the militant atheists).
To paraphrase Aristotle, when we choose what is good, we are the best of animals, and when we choose unwisely, we are the worst. In the ultimate extreme, the human descends from being reality-based to merely carbon-based, i.e., just a statistically rare organization of molecules instead of a molecular instantiation of spirit, or weird made flesh.