There are certainly plenty of messages or themes for you to identify in this great dystopian novel, but one of the more interesting ones is the presentatino of creativity and artistic talent. We are persented with a world where the grim struggle for survival has seemingly all but vanquished any latent spark of artistic expression in the humans that remain in this bleak post-apocalyptic world. However, the clear talent that Jo, Kira and Thomas have is presented in a supernatural way, as they are able to achieve great works of art through their talent seemingly taking control of them and directing their body. Note the way that Thomas's carving that he did when he was just a child and Kira's piece of cloth that she wove in a sense "made themselves."
The Council of Guardians recognises the potential power of creativity in the three children and are obviously attempting to use it for their own purposes, to fashion their own future. This, interestingly, creates a feeling of oppression in Thomas, Kira and Jo as they feel their talents being directed not along spontaneous and natural routes but towards a specific goal as they are wielded by the Council. Note Kira's frustration and her desire to weave her own patterns:
She wanted her hands to be free of the robe so that they could make patterns of their own again. Suddenly she wished that she could leave this place, despite its comforts, and return to the life she had known.
Artistic talent is thus presented as a true force to help change and develop the future, but at the same time it is a force that can be manipulated and used and not allowed to develop naturally.