Harry chuckled. "Isn't that the truth." He was relieved though, but Remus' word, his trust, his being there. And knowing that he'd help James with the theory, in a way that perhaps James could understand made him feel better. Perhaps James would even realise why he was worried? Even if he didn't, maybe he'd see facts for what they were.
"I am sincerely glad that you are involved in all of this," he said. "But then you always were a good teacher."
His smile widened when he saw that grin on his friend's face, chuckling a bit. "He would have been insane not to, with the way you were speaking of him last week," he said. "I'm glad. You deserve every bit of happiness you can get."