In a gallery at The Metropolitan Museum of Art Henry (Francis Guinan) guards Rembrandt’s Aristotle Contemplating a Bust of Homer. If it really depicts Aristotle at all. Henry is partial to the argument Rembrandt may have substituted the Greek painter Apelles in the philosopher’s place as an affront to the wealthy Italian who commissioned it. Were artists the true philosophers in Rembrandt’s opinion? For Henry, a scholarly man who has spent his life studying paintings and loving a poet, this seems about right. So begins Jessica Dickey’s funny and touching play, The Rembrandt, now enjoying its Chicago premiere at Steppenwolf Theatre in an elegantly designed production directed by Hallie Gordon.