David Nicholls said this quote

He had always imagined that some sort of emotional mental equipment was meant to arrive, when he was forty-five, say, or fifty, a kind of kit that would enable him to deal with the impending loss of a parent. If he were only in possession of this equipment, he would be just fine. He would be noble and selfless, wise and philosophical. Perhaps he would even have kids of his own, and would presumably possess the kind of maturity that comes with fatherhood, the understanding of life as a process.