Comments by the Faithful & Discreet Slave class about those serving where the need is greater, specifically  in their relationship to the progress of the worldwide Kingdom Preaching work:

"What accounts for such progress? Many things. Missionaries trained at the Watchtower Bible School of Gilead and, more recently, upwards of 20,000 graduates of the Ministerial Training School have made a huge contribution. So have the many Witnesses who at their own expense have moved to lands where the need for Kingdom publishers is greater. Such self-sacrificing Christians—men and women, young and old, single and married—play a significant role in preaching the Kingdom message throughout the earth.  They are greatly appreciated."

Watchtower July 1, 2005, Pages 22-23