本文主要透過蔡水林（1932-2015）——屏東在地的藝術家和藝術教育者——生命及創作表現探討未完成相關概念。文章分為二部分，第一部份主要從儂希和朱利安對未完成、草稿、速寫、研究∕練習∕習作、真理等概念及其間關係做梳理，並從蔡水林生前最後遺作及其意義談起，帶出其最後作品的未完成真理性、家庭性及身分的回歸與轉化。第二部分主要談及教師身分和其課堂中關於速寫、素描及草稿的產生。這部份討論並交代蔡水林的作品的示範性和草稿—未完成品的公開性，這些都關聯到教室、課堂和工作室等教育場所的認定與轉化，而草稿、速寫和素描的創作發生與意義都必須聯繫到其教師身分與其意識。

Tsai Shui-Lin (1932-2015) was a local artist and art teacher in Pingtung. This paper investigates the concept of unfinishedness and self-schema in his artworks. There are two parts in this article. The first is about the meaning in Tsai’s last and unfinished work and how they convey the messages of return and conversion of his identity and family-ness. We also discuss and apply Jean-Luc Nancy’s thinking of drawing and François Jullien’s theory of sketch. The second part focuses on his identity as a teacher and what he taught about sketch and draft in his class and studio.