When an assignment to some particular “towards-this” has been thus circumspectively aroused, we catch sight of the “towards-this” itself, and along with it everything connected with the work—the whole ‘work-shop’—as that wherein concern always dwells. The context of equipment is lit up, not as something never seen before, but as a totality constantly sighted beforehand in circumspection. With this totality, however, the world announces itself.

When we talk in an ontically figurative way of the lumen naturale in man, we have in mind nothing other than the existential-ontological structure of this entity, that it is in such a way as to be its “there”. To say that it is ‘illuminated’ [“erleuchtet”] means that as Being-in-the-world it is cleared [gelichtet] in itself, not through any other entity, but in such a way that it is itself the clearing.2 Only for an entity which is existentially cleared in this way does that which is present-at-hand become accessible in the light or hidden in the dark. By its very nature, Dasein brings its “there” along with it. If it lacks its “there”, it is not factically the entity which is essentially Dasein; indeed, it is not this entity at all. Dasein is its disclosedness.

So if it is said that ‘Being’ is the most universal concept, this cannot mean that it is the one which is clearest or that it needs no further discussion. It is rather the darkest of all.

Dasein is inclined to fall back upon its world (the world in which it is) and to interpret itself in terms of that world by its reflected light