The DARKEST hour is just before the dawn
1650
Pisgah Sight
II. xi.
It is always darkest just before the Day dawneth.
1760
in
Journal
(1913) IV. 498
It is usually darkest before day break. You shall shortly find pardon.
1897
1897
Hist. our Own Times
V. iii.
Ayoob Khan now laid siege to Candahar … As so often happens in the story of England's struggles in India, the darkest hour proved to be that just before the dawn.
1979
Arrow of God
IV. x.
I know how you feel … It's probably just the darkest-hour-before-the-dawn syndrome.
hope and despair