My grandfather often quotes the saying "Practice makes perfect."

saying 是可数名词，意思是"谚语、格言、俗语"，指代广为流传、用来表达人生道理或智慧的短句。 "Practice makes perfect" 是一句常见的英语谚语，直译为"练习造就完美"，中文对应为"熟能生巧"。