Starting over isn’t easy. Most of us live with wreckage in our heads. The calamities of the past don’t just get up and walk away; they hang around, like unwanted tenants, drumming on your skull. That’s why people who say “it’s never too late” should be strangled with rainbows. Any trite response should be met with force. As adults, we need to reconcile ourselves with mountains. That takes some doing. Only incipient people can change without stress. For those who’ve lived, change can feel like you’re unravelling. Mike Mills’ new movie, Beginners, is about adults stumbling into a new phase of their lives. They stumble because they’re not ignorant of history. Their new lives are always mindful of the past.