Being-in-the-world has concern, guided by circumspection, to discover the ready-to-hand and to preserve it as thus discovered.
Logos means letting something be seen in its togetherness [as a whole]. Think of the distinction between 1 using a pencil and 2 having the pencil break -- and just staring at it. In terms of structure, Being and Time remains as it was when it first appeared in print; it consists of the lengthy two-part introduction, followed by Division One, the "Preparatory Fundamental Analysis of Dasein," and Division Two, "Dasein and Temporality.
They are acted out in the presence of one's being-alongside-entities and caring for others. We reach out towards the future while taking up our past thus yielding our present activities. The lecture course, Prolegomena zur Geschichte des Zeitbegriffs History of the Concept of Time: Prolegomena,was something like an early version of Being and Time.
To us, ordinarily, space appears to be time independent, and our everyday consideration and conception of space and our use of it in conversation make it essential for our view of our environment and our being-in-the world.
Note how the future--and hence the aspect of possibility--has priority over the other two moments. And he sees this general structure in the 'empirical,' ontic level of average everydayness. Truth tests look for a concordance between observations, or more accurately between intellectual perceptions.
Find above a summary of one the greatest philosophical work of the 20th century. A panicky person behaves unidirectionally and unconstructively, that is, in a bewildered fashion. Dasein must also be understood in terms of its total possibilities.