חובות הלבבות שער היחוד פרק ו

In Obligations of the Heart, [1:6] Rav Bahayee Ibn Pakuda says if something has a beginning it must have an end because if something has no beginning it can not have an end.

Here in this diagram I have tried to work this out.

E=End; B=Beginning; NB=No Beginning; NE=No End.