Donal wrote:

This picture made me stop dead in my tracks.

... and yet the picture really affects me.
...
I wish that I could appreciate art, but I cannot.

It seems to me that you can.

Appreciating art isn't about 'understanding' it, or analysing, or
intellectualising, but about being affected by it - having a reaction, being
drawn into it. Good art grabs you by the boo-boo. Whether or not a piece of
art is 'good' has more to do with the person experiencing it, than any
intrinsic quality of the artwork itself. "That's a good painting" is,
generally speaking, a metaphor for "I like that painting".


--
Wally
www.artbywally.com
www.wally.myby.co.uk