monomania
obsessed with one idea
sanctimonious
self-righteous
choler
anger
sullen
brooding, angry
idiosyneratic
distinctive, individual
castigated
punish
extemporaneous
impromptu
gloaming
dusk
Rubicon
point of no return
aesthetic
appreciates beauty in nature
perambulation
patrol
taiga
subarctic forest
reverie
dream
obliquely
indirectly