To twist a popular Twitter meme, life comes at you fast — and at the same time, slowly as molasses — in “Quest,” Jonathan Olshefski’s living, breathing, stunning documentary study of an African-American family in North Philadelphia weathering a tumultuous decade. Inhabiting the loving, creative, occasionally conflicted household of Christopher and Christine’a Rainey with close-quarters warmth that never crosses the line from intimate to invasive, Olshefski’s film doesn’t set out with a thesis to prove. Rather, it finds its resonance as it goes along, stumbling into crisis as spontaneously as its human subjects do, and finally emerging as an essential reflection of social transitions — for better and worse — in Barack Obama’s America. “Quest” gains further accidental power, of course, from hitting screens at the shadowed outset of Donald Trump’s ideologically opposite presidency, which augurs a more compromised future for the Raineys and families like them; such nervy topicality only enhances this superb film’s more crafted virtues.  – Variety