I remember how I would lie half-awake at night listening to my son breathe when he was young and had asthma, and then, when he was a teen, until I heard the front door chime open, and I knew that he was home safe.
천식을 앓던 어린 아들의  숨소리를 들으며 반쯤 깬 상태로 누워 잠을 설치던 때가 떠오르네요. 아들이 십대가 됐을 땐 집에 들어오는 소리가 들리면 그제야 안심하고 잠을 이룰 수 있었습니다.