HT1891 - Grabbed by Artwork

I suppose all of us have, from time to time, been mesmerized by a piece of artwork. It grabs us, it seduces our attention, it fills our consciousness. Why? What is it about a piece of artwork that gives it this power to influence us so deeply? Maybe not 100% of the time, but most frequently I find this happens when the artwork engages my imagination, when it allows me to drop my normal awareness of the world and to be transported to a world of its making.