自画自虐：
階段を描いてみようと葛飾区役所庁舎玄関の階段に挑戦したが無残な結果に終わった。未熟は承知のうえである。未熟なるが故に遊びとして成立するのだとハーバード大学の教授も19分あたりでおっしゃている。
Prof. Ellen Langer: Reimagining aging and longevity: Is mindfulness the secret?
https://www.youtube.com/watch?v=Gmi9OoCxhoM
Own-creation, self-deprecation:
I tried to draw a staircase and challenged the staircase at the entrance of the Katsushika Ward Office building, but the result was disappointing. I am aware that I am a novice. A professor at Harvard University says at around the 19-minute mark in the video that pastime can be pleasure when there are rooms for improvement.
Prof. Ellen Langer: Reimagining aging and longevity: Is mindfulness the secret?