lilacs complete

The Frangrance of Lilac Cuttings in a Bowl with Stones; 11"x 14"; graphite on paper

How do you know when a drawing/painting is done?  My pieces "ping" when they're finished.  It's hard to explain but it's very distinct, satisfying and impossible to time.  I've learned to sense when all of the little irritants are put to rest and harmony and unity prevail.  There's a lot of walking to and fro involved - and looking at things from all angles, including from in a mirror.

To go over this line may spoil everything.  One mustn't overcook things.  You want to go for al dente and leave something to chew on - something for the viewer to do.