Dogen, "Actualizing the Fundamental Point"

Firewood becomes ash, and it does not become firewood again. Yet, do not suppose that the ash is future and the firewood past. You should understand that firewood is firewood, which fully includes past and future. Ash is ash, which fully includes future and past. Just as firewood does not become firewood again after it is ash, you do not return to birth after death.

-Dogen, "Actualizing the Fundamental Point"