本文旨在探討薛偉化身為魚，在魚身、人心的衝突中，所表現出來的心理矛盾與象徵意義。薛偉重病，向江潭尋求清涼進而化魚，隱然表現出人類以原始意象的回歸，向潛意識探求，以尋求夢幻變形的再生力量。不過，薛偉披上魚服，在享受短暫的喜樂後，即因食餌被捕、被殺，使「魚服」的夢想成為一場失去「人」的身份，失去文明的夢魘。對於文明人（薛偉）而言，「魚服」是取得解決現實困境能量的想像性幻設。人的文明意識並未因魚服而消失，異質（人／魚）同構的分裂性，反倒激起更大的矛盾和衝突，使全文擺盪於文明與自然的二元對立組合間。同時，「魚服」的象徵與「夢幻」意象的結合，適切地將「人為刀俎，我為魚肉」的想像性衝突做妥切的轉化，讓全文在各種對比與矛盾中更突顯出藝術張力，使它成為一篇突出於其它相關宣教思想的傳奇作品。

The major subject discussed Xue Wei be a fish and conflict between fish and human. When Xue Wei was sick, he wants to explore a nice and cool for the river. He dreams that he will be a fish. He behaved as return to archetype. But the happy just in a short period. Because some one caught it by fishing and he will fall in a nightmare. For the cultures of human, the dream is a moment. He wants to solve a difficult situation by the libido. The consciousness of civilization doesn't disappeared during he was a fish. The conflict is more and more clear. Finally, he does back to the world by decapitating. This is a conscious of primitives, which give up by the human.