"...Poetically Man Dwells..." § 219
Only insofar as man takes the measure of his dwelling in this way is he able to be commensurately with his nature. Man's dwelling depends on an upward-looking measure-taking of the dimension, in which the sky belongs just as much as the earth.
This measure-taking not only takes the measure of the earth, γῆ, and accordingly it is no mere geo-metry. Just as little does it ever take the measure of heaven, οὐρανός, for itself. Measure-taking is no science. Measure-taking gauges the between, which brings the two, heaven and earth, to one another. This measure-taking has its own μέτρον, and thus its own metric.
Man's taking measure in the dimension dealt out to him brings dwelling into its ground plan. Taking the measure of the dimension is the element within which human dwelling has its security, by which it securely endures. The taking of measure is what is poetic in dwelling. Poetry is a measuring. But what is it to measure? If poetry is to be understood as measuring, then obviously we may not subsume it under just any idea of measuring and measure.
Poetry is presumably a high and special kind of measuring. But there is more. Perhaps we have to pronounce the sentence, "Poetry is a measuring" with a different stress. "Poetry is a measuring." In poetry there takes place what all measuring is in the ground of its being. Hence it is necessary to pay heed to the basic act of measuring. That consists in man's first of all taking the measure which then is applied in every measuring act. In poetry the taking of measure occurs. To write poetry is measure-taking, understood in the strict sense of the word, by which man first receives the measure for the breadth of his being. Man exists as a mortal. He is called mortal because he can die. To be able to die means: to be capable of death as death. Only man dies—and indeed continually, so long as he stays on this earth, so long as he dwells. His dwelling, however, rests in the poetic. Hölderlin sees the nature of the "poetic" in the taking of the measure by which the measure-taking of human being is accomplished.