灰
This Chinese character means ash.
You can watch how to write this. - (「灰」の書き順（筆順）動画 - 漢字書き順辞典)
This Chinese character is often read as "はい".
In Japan, after death, the body is usually cremated.
When someone you were close to dies and is burned to ashes, you might understand for the first time.
The eternal and unchanging truth of this world.
By Higashi-Mikawa Kyōjindō Shujin (東三河狂人堂主人)