塵も積もれば山となる

(ちりもつもればやまとなる)

Japanese meaning

どんなにわずかなものでも、少しずつ積み重ねていけば、やがては大きなことが達成できるという教え。

English meaning

Even small amounts accumulate to become a mountain.

Literal English translation

Even dust, if piled, becomes a mountain.