As the ego cogito, subjectivity is the consciousness that represents something, relates this representation back to itself, and so gathers with itself. ↗
Time is not a thing, thus nothing which is, and yet it remains constant in its passing away without being something temporal like the beings in time. ↗
Being and time determine each other reciprocally, but in such a manner that neither can the former - Being - be addressed as something temporal nor can the latter - time - be addressed as a being. ↗