Jack let his eyes linger on the blush even as Marek looked away. "Well that is very kind of you to say." He repeated again, chuckling but thankful that Marek thought the grey hair looked nice on him. He could tell that he had surprised Marek by mentioning that he wanted to hear him play, but Jack kept his gaze on the younger man. "I wouldn't want to interfere with your studies, but perhaps this weekend? If not, that is fine. I enjoy music. My mother was always filling our house with music when I was growing up." He gave him a reassuring smile and nodded. "You can learn a lot from history, that is for certain. You can learn a lot from the mistakes of others."