Now using a different illustration, Jehovah speaks to his people as to a walled city: “Upon your walls, O Jerusalem, I have commissioned watchmen. All day long and all night long, constantly, let them not keep still. You who are making mention of Jehovah, let there be no silence on your part,

Isaiah 62:6,

Day and night, watchmen on those walls are alert to ensure the security of the city and to relay warning messages to her citizens.​—Nehemiah 6:15; 7:3; Isaiah 52:8.

¹⁴ In modern times Jehovah has used his anointed watchmen to show meek ones the way to freedom from bondage to false religion. These ones have been invited to come within his organization, where they find protection from spiritual contamination, ungodly influences, and Jehovah’s displeasure. (Jeremiah 33:9; Zephaniah 3:19) Vital to such protection is the role of the watchman class, “the faithful and discreet slave,” which provides spiritual “food at the proper time.” (Matthew 24:45-47)

15. How do the watchman class and their companions serve Jehovah constantly?

¹⁵ The service of the watchman class and their companions continues! Their whole-souled attitude is seen in the zealous activity of millions of faithful individuals supported by traveling overseers and their wives; volunteers in the various Bethel homes and printing facilities of Jehovah’s Witnesses; missionaries; and special, regular, and auxiliary pioneers. In addition, they work hard in constructing new Kingdom Halls, visiting the sick, assisting individuals who face challenging medical situations, and providing timely relief to victims of disasters and accidents. Many of these self-sacrificing individuals often serve literally “day and night”!​—Revelation 7:14, 15.