As much as you love your mother — and she loves you — coming together in tight quarters requires patience and understanding. Despite the stress, if you look for it, you may discover a precious lesson. One night, I learned mine was about grit and resilience. The phone rang after midnight. My dad had suffered a major heart attack. As one of five daughters and a doctor, I traveled to meet Mom at a shabby on-site hospital hotel. In her seventies with multiple medical problems of her own, walking long distances was challenging for her. Three times a day, I pushed her in a wobbly wheelchair to visit Dad, back…