Afraid? Of whom am I afraid?
porter of my father's lodge
Death as a servant at God's house—not a king or judge, just the doorman. The verb 'abasheth' (embarrasses) is deliberately small for something we're supposed to fear.
comprehendeth me
She's inside life, so how can she fear it? The logic is geometric: you can't be afraid of the container you're already in.
fastidious forehead
The horizon as a prim Victorian woman, fussy about appearances. Does the east worry about whether dawn will show up? Obviously not.
impeach my crown
Legal term—to charge with misconduct. Her certainty about resurrection is as solid as royalty; questioning it would be treason against herself.