Not a value judgment or your personal opinion. To explain or tell the meaning, translate. This is the most important part of the process. Not a value judgment. The more background, knowledge, and familiarity you have on the subject the better your interpretation will be.
Experience is of value when the goal is understanding .
Remember that all of the best art is metaphor so use your knowledge of history, religion, politics and the life and history of the artist to make decisions about meanings of the significant parts. Usually a comparison. Is a value judgment - an opinion. Judgments are not always necessary to criticism. If you ever do make a judgment remember that an educated person will always back up his opinions with facts and expert opinion.