What an artist worries about as he plans his pictures, makes his sketches, or wonders whether he has completed his canvas, is something much more difficult to put into words. Perhaps he would say he worries about whether he has got it 'right'.
There really is no such thing as art. There are only artists.
Art does not copy nature - it suggests it.
All art is image making and all image making is the creation of substitutes.
The Painter must leave the beholder something to guess.
One never finishes learning about art. There are always new things to discover. Great works of art seem to look different every time one stands before them. They seem to be as inexhaustible and unpredictable as real human beings.