I am bored, sitting on the inkstone, in the mirror of my heart, trivial things keep appearing, and my mind is full of books. Unreasonable people can also be blamed.

Yoshida's grass in vain (つれづれぐさ) is one of the representative works of Japanese medieval literature.

It is generally believed that Grass in vain was written between 1330 and 1332. Grass in vain consists of a preface and 243 other paragraphs, with themes around impermanence, death, natural beauty and so on.