Ian Mcewan said this quote

When he thought of her, it rather amazed him, that he had let that girl with her violin go. Now, of course, he saw that her self-effacing proposal was quite irrelevant. All she had needed was the certainty of his love, and his reassurance that there was no hurry when a lifetime lay ahead of them. Love and patience- if only he had had them both at once- would surely have seen them both through.