Crossword puzzle clue "dark times in one's life"

Source of "Say! In the dark? Here in the dark! Would you, could you, in the dark?"

Dark times in one's life

"It builds strong bones, but who cares in this dark, dark world..."

Dark as dark can be

Dark purplish-brown to dark red

Poet who wrote "In the middle of the journey of our life I came to myself within a dark wood where the straight way was lost"

Source of the line "Midway upon the road of our life I found myself within a dark wood ..."

Subject of the bio "A Life in the Dark"