Question: Will the stations of the believers continue to be different hereafter?
'Abdu'l-Baha answered, "Yes, it will be necessarily so, for the Kingdom requires it.
"The King appoints one to be his prime minister, another to be his greatest general, another a soldier, and so on from the highest to the lowest. If all were generals or all were soldiers, there would be no kingdom.
"God created the mineral, the vegetable, the animal, and man. Had He created only man there would be no world."
- 'Abdu'l-Baha (Words of ‘Abdu’l-Baha, recorded by Helen Goodall and Ella Goodall Cooper during their pilgrimage in 1908; ‘Daily Lessons Received at Akka January 1908’)