more dense

This is from an essay by Natalie Rusz, found in a book that Santa gave me, and I think it's really quite moving. Natalie spent much of her childhood being cared for with other children in a children's hospital where "we were some of us handicapped, but none disabled, and in time we were each taught to prove that for ourselves." She wrote:
"For most of us, as people of crisis, it became clear that horror can last only a little while, and then it becomes commonplace. When one cannot be sure that there are many days left, each single day becomes as important as a year, and one does not waste an hour in wishing that that hour was longer, but simply fills it, like a smaller cup, as high as it will go without spilling over. Each moment, to the very ill, seems somehow slowed down and more dense with importance, in the same way that a poem is more compressed than a page of prose, each word carrying more weight than a sentence."