I used to write in the early morning hours and still do during long cold winter months.
During my working years the muse would drive me from my sleep and bed to write. Man it was hard getting up to work 8 hours after having slept maybe 2 hours.
My muse, she drives me from my sleep through torment and woe if I try to ignore or remain asleep.
A muse cannot be ignored or denied.
One pays a heavy price for such 'insolence'.