When to soft Sleep we give ourselves away,
And in a dream as in a fairy bark
Drift on and on through the enchanted dark
To purple daybreak–little thought we pay
To that sweet bitter world we know by day. – Thomas Bailey Aldrich

Sometimes I sit up late with my thoughts, reluctant to fall asleep and leave my thoughts alone by themselves. – Robert Brault, rbrault.blogspot.com

Nor will the sweetest delight of gardens afford much comfort in sleep; wherein the dullness of that sense shakes hands with delectable odours; and though in the bed of Cleopatra, can hardly with any delight raise up the ghost of a rose. – Sir Thomas Browne