This is an excerpt from the Blue Nines and the Red Words.
Explanation:
The final paragraphs show Tammet's emotional response to every number. When he counts the numbers from pictures, he can relax and interact with the situation he is in.
Tammet says when he closes his eyes, he sees thousands of numbers in his mind and the prime numbers stand out among them as they are smooth.
At nights when he has difficulty in falling asleep, he imagines walking around the numerical landscape and he feels safe and happy. he is never lost as the prime numbers act as signposts.
Providing background on the Renaissance would allow Charlie to talk about the shared history. This leads to talking about the effect the period had on art, and then specifically on the artists mentioned.
