O ye true friends! Make ye a mighty effort, that this world may become another world......
Translated
oceanoflights.org/abdul-baha-tablets-talks-bahai-library-146-en/
[Extract from a Tablet of 'Abdu'l‑Bahá]
O ye true friends! Make ye a mighty effort, that this world may become another world, and this darksome earth may become shining and resplendent through the rays of the Sun of Truth.
---'Abdu'l‑Bahá