Board Thread:Episode Discussions/@comment-1181222-20171115120855/@comment-2112031-20171115231540

I think the "draw with feeling" aspect is about the fact that Inojin was starting to treat his drawings the same way he, for example, treated his kunai, as just tools in his arsenal with otherwise no personal value to him.

Sai could have derived his feelings from his sense of duty to Root and his love for his brother. It was, after all, Shin who encouraged his talent for drawing in the first place.