How to look at a vigraha?

Hello everyone, I often visit temples but I enjoy them in a more aesthetic sense, like admiring the architecture. I do not feel anything looking at a vigraha. To me, they are just statues. I understand they are consecrated with mantras and the deity reside in them. But this is just an intellectual understanding. I have never been emotionally moved looking at a vigraha as I see so many people are. I have experienced brief moments of devotion at times, but mostly at home and usually when I am silently contemplating a deity for an extended period. I don't know think I can have the same experience during a fleeting glimpse of a vigraha. So, my question is: What should I be "seeing" when I look at a vigraha that I cannot see in my minds eye?