"In anxiety there lies the possibility of a disclosure which is quite distinctive; for anxiety individualizes. This individualization brings Dasein back from its falling, and makes manifest to it that authenticity and inauthenticity are possibilities of its Being. These basic possibilities of Dasein (and Dasein is in each case mine) show themselves in anxiety as they are in themselves—undisguised by entities within-the-world, to which, proximally and for the most part, Dasein clings."
January 1, 1970
https://en.wikiquote.org/wiki/Individuality