A few questions to guide as you look:
-Does this piece evoke an emotion? If so, can you identify why?
-Is this piece self explanatory--or does it urge you as the viewer to decipher the meaning and contextualize it to your experience?
-What colors are used? Why do you think they chose these colors/do they signify anything?
-What medium is used? Why did the artist choose to communicate via that medium as opposed to another?
-Can you tell what the artist might be contemplating when creating (certain ideas/concepts i.e. politics, theology, nature, etc)?
-Why did the artist write what they did in their blurb? How does it correlate to their piece/their identification through their art?
-How does this piece (including blurb) affect you and your life experience especially within a Christian "worldview"?
The list can be long (and let your questions go on!) when observing a piece! But more than anything--remember it is okay to have an opinion! I encourage you to have a reason behind your opinion (even if it's "just" a "feeling") and please do spend more than 30 seconds viewing a piece!