"We must strive unceasingly and without rest" to convert everyone to Baha'ism

We must strive unceasingly and without rest to accomplish the development of the spiritual nature in man, and endeavor with tireless energy to advance humanity toward the nobility of its true and intended station.

- Abdu’l-Bahá

http://reference.bahai.org/en/t/ab/PUP/pup-24.html