Was it a dreame, or did I see it playne,
a goodly table of pure yvory:
all spred with juncats, fit to entertayne
the greatest Prince with pompous roialty.
The confusion of dream and real sight is important for… everything poetic? Compare the famous ending of Keats'  Ode to a Nightingale : 
 
 Fled is that music:—Do I wake or sleep? ― John Keats – Ode to a Nightingale 

Amoretti: Sonnet 77