because understanding always has to do with the complete disclosedness of Dasein as being-in-the-world, the involvement of understanding is an existential modification of project as a whole. In understanding the world, being-in is always also understood. Understanding of existence as such is always an understanding of world.
As factical, Dasein has always already transferred its potentiality of being into a possibility of understanding.
In its character of project, understanding constitutes existentially what we call the sight [Sicht] of Dasein. In accordance with the fundamental modes of its being which we characterized as the circumspection [Umsicht] of taking care, the considerateness [Rucksicht] of concern, and as the sight geared toward being as such for the sake of which Dasein is as it is, Dasein is equiprimordially sight existentially existing together with the disclosedness of the there. We shall call the sight which is primarily and as a whole related to existence transparency [Durchsichtigkeit]. We choose this term to designate correctly understood "self-knowledge" in order to indicate that it is not a matter here of perceptually fincling and gazing at a point which is the self, but of grasping and understancling the full disclosedness of being-in-the-world throughout all its essential constitutive factors. Existing beings glimpse [sichtet] "themselves" only when they have become transparent to themselves equiprimordially in their being with the world, in being together with others as the constitutive factors of their existence.
Conversely, the opacity [Undurchsichtigkeit] of Dasein is not solely and primarily rooted in "egocentric" self-deceptions, but just as much in ignorance [Unkenntnis] about the world.
[147] We must, of course, guard against a misunderstanding of the expression "sight." It corresponds to the clearedness [Gelichtetheit] characterizing the disclosedness of the there. "Seeing" not only does not mean perceiving with the bodily eyes, neither does it mean the mere nonsensory perception of something objectively present in its objective presence. The only peculiarity of seeing which we claim for the existential meaning of sight is the fact that it lets beings accessible to it be encountered in themselves without being concealed. Of course, every "sense" does this within its genuine realm of discovery. But the tradition of philosophy has been primarily oriented from the very beginning toward "seeing" as the mode of access of beings and to being. To preserve this connection, one can formalize sight and seeing to the point of establishing a universal term which characterizes every access as access whatsoever to beings and to being.
By showing how all sight is primarily based on understanding- the circumspection of taking care is understanding as comprehension [Verstandigkeit]—we have taken away from mere intuition [puren