Yet another leitmotiv in Etruscan jewelry is the Egyptian Scarab. His psychological leitmotiv is complacency, and his geometrical expression roundness. The leitmotiv of his scientific and artistic work is "excess". Each of these days had a theme and a color as well as a leitmotiv. It reappears several times in the book (thus becoming a leitmotiv). COTA's leitmotiv is "Lifelong learning through the arts".