Wilhelm von Humboldt on “the individual man, and the highest ends of his existence” (via Henrik Karlsson):

The true end of Man, or that which is prescribed by the eternal and immutable dictates of reason, and not suggested by vague and transient desires, is the highest and most harmonious development of his powers to a complete and consistent whole. Freedom is the grand and indispensable condition which the possibility of such a development presupposes; but there is besides another essential,—intimately connected with freedom, it is true,—a variety of situations.

The efficiency of all such unions as instruments of cultivation, wholly depends on the degree in which the component members can succeed in combining their personal independence with the intimacy of the common bond; for whilst, without this intimacy, one individual cannot sufficiently possess himself, as it were, of the nature of the others, independence is no less essential, in order that the perceived be assimilated into the being of the perceiver.

[I]n the highest sense, that each still perceives the beauty and rich abundance of the outer world, in the exact measure in which he is conscious of their existence in his own soul.

Now, whatever man receives externally, is only as the grain of seed. It is his own active energy alone that can convert the germ of the fairest growth, into a full and precious blessing for himself. It leads to beneficial issues only when it is full of vital power and essentially individual. The highest ideal, therefore, of the co-existence of human beings, seems to me to consist in a union in which each strives to develope himself from his own inmost nature, and for his own sake.

It is, on the other hand, undeniable that, whereas physical variety has so vastly declined, it has been succeeded by an infinitely richer and more satisfying intellectual and moral variety, and that our superior refinement can recognize more delicate differences and gradations, and our disciplined and susceptible character, if not so firmly consolidated as that of the ancients, can transfer them into the practical conduct of life […]

[R]eason cannot desire for man any other condition than that in which each individual not only enjoys the most absolute freedom of developing himself by his own energies, in his perfect individuality, but in which external nature even is left unfashioned by any human agency, but only receives the impress given to it by each individual of himself and his own free will, according to the measure of his wants and instincts, and restricted only by the limits of his powers and his rights.

Reason must never yield aught save what is absolutely required to preserve it.