I concluded my studies in Philosophy at the
 University of Utrecht with a thesis commenting
 the notions of  'Time' and 'Temporality' in
 Martin Heidegger's Sein und Zeit.
 That book, published in 1927, is considered
 to be one of the major works in Philosophy.
 Inevitably a lot of secondary literature on that 
 book has been published ever since, but little
 - almost nothing that really matters - on the
 second half of its title: Time.
 An astonishing fact to me, because the central
 vision of the thoughts developed in that work 
 is elaborated in exactly the chapter that deals
 with the notion of  'Temporality'.
 A fact nevertheless  I had to prove at length
  to convince especially my principal academic reviewer that it was worth-while working 
 on it. Once this fact however was proven convincingly my work on this subject was  
 enthusiastically followed by the faculty. Yet it was not this fact that romantically induced my 
 wish to work on the notions of  'Time' and 'Temporality'. The phenomenon of 'Time' fascinated 
 me already since my boyhood and I was only eager for concluding my academic studies with an  
 investigation of the fundamental ontological thoughts on this subject. Something I considered 
 at the same time a nice completion of the 'main forming period' of my life.
 My work than, that is written in Dutch (215 pages), is divided in three parts.
 In the first, also as a historical thematic introduction to the notion of time, Heidegger's notion of
 time is compared (and contrasted) with the common philosophical and the mathematical or
 physical understanding of it. Especially Bergson's notions of  'temps' and 'durée' are given 
 attention, also to value Heidegger's criticism on them. The neo-Kantian ideas of time are 
 investigated too, and the same with the notions of time as used in the works of Husserl and
 Brentano. By this the originality of Heidegger's concepts is validated.
 The second part consists out of a textual introduction explaining the key-notions by which the
 translated third chapter from the second part of Sein und Zeit can be grasped properly.
 In an appendix after the third part also all the main notions of Sein und Zeit are elucidated.
 In the third part the two main concepts are commented that form Heidegger's notions of time
 and temporality . Also becomes clear that the so often mentioned influences of Kierkegaard on
 Heidegger's ideas do not reach further than they possible could have had in Jasper's 
 philosophy, which in that perspective ought to be given the priority than.
 As a second appendix is an article presented with the conclusions of a study of the total work 
 of Emil Lask with regard to possible influences by his work. This study has proven that 
 suggestions of what influence so ever, and more over on the forming of Heidegger's notions 
 of time and temporality, are completely false.
 This work of mine is a contribution by which in the history of thought  Heidegger's fundamental
 ontological notions of time and temporality have been given the proper place they did not had
 before. The traditionally too easily accepted nonsense about the immediate forming influences 
 either by philosophers who developed ideas about time before, or by Heidegger's philosophical
 contexts as well at the time as at the days of his education, repeated again and again in the
 secondary literature has been exposed as such. More over, the thorough investigations, closely
 related to the original text, have shed new light now on as well the understanding of the
 architecture of Sein und Zeit as on the genesis of its main constituent ideas and their expression.
Herbert ten Thij
 A re-edited and revised publication in English of the main parts of this work, also interpreting
 the perspective of a theory of modal evolution, is in progress now.


[ back | back to portfolio | back to start page ]