Endings of dreams are important because they usually reveal what dreamers are inclined and ready to do about  conflicts dramatized in their dreams…

Comparisons of the beginnings and ends of dreams are of great prognostic significance, and when dreamers move toward improvement during dreams, prognosis for spontaneous and therapeutic improvement are favorable. As a rule, nightmares do not augur a worsening of dreamer’s personal conditions…

Both affective upheaval and the dreamer’s resultant mobility are much more favorable than affective flatness or passive resignation.

See Zygmunt Antoni Piotrowski, in  Dreams: A Key to Self Knowledge.