Two themes dominate the hymn the Tongans sang 160 Pentecosts ago: the universal reach of Jesus’s reign, and the unrivaled blessings of that reign. The risen Christ is on the move, undeterred until his blessed foot treads every coastland and continent, every inland and island, from Israel to England to Tonga. The Tongans sang because Christ’s reign had reached even them, and because his was the kind of reign to make one sing.

On Pentecost Sunday 1862, as Western eyes watched civil war rip through America, an event just as momentous unfolded half a world away, hidden from every headline. Some five thousand men and women, many of them former cannibals, gathered on a South Pacific island to worship Jesus Christ.

George Tupou I, the first Christian king of Tonga, had assembled his citizens as part of a ceremony commemorating a new code of laws. And there, “under the spreading branches of the banyan trees,” writes George John Stevenson, with the king surrounded by “old chiefs and warriors who had shared with him the dangers and fortunes of many a battle,” five thousand voices sang,

Jesus shall reign where e’re the sun
Does his successive journeys run;
His kingdom stretch from shore to shore,
Till moons shall wax and wane no more.

For centuries, the sun had run from east to west, the moon had waxed and waned, over a Tonga without Christ. His gospel had not yet reached Tonga’s shores; his kingdom had not yet touched Tongan hearts. But now, a new nation rose to sing his reign.

First Missionary Hymn

Although the words were not in the Tongans’ mother tongue (the song having been taught to them by Methodist missionaries), few lyrics could have described the situation in Tonga more fittingly. For by 1862, the hymn told their history.

“Christ’s Kingdom Among the Gentiles” — or, more commonly today, “Jesus Shall Reign” — has been labeled by some “the first missionary hymn.” Almost a century before the modern missionary movement, before William Carey sailed to India, and Adoniram Judson to Burma, and Hudson Taylor to China, and Methodist missionaries to Tonga, the English minister Isaac Watts (1674–1748) penned a hymn of Christ’s coming reign: a reign that would reach islands far beyond Britain and gather tongues far different from English.

To look out over unreached lands and sing “Jesus shall reign” is always a cry of faith, but Watts needed far more faith than we do today. The mustard seed of the kingdom had grown large by 1719 (when Watts published the hymn), but its branches had not yet spread far beyond the Western world (Matthew 13:31–32). It was not the kind of tree we see today, sheltering multitudes of peoples far south and east of Europe and North America.

Nevertheless, Watts knew his Bible — and in particular, he knew Psalm 72, of which “Jesus Shall Reign” is a Christian paraphrase. And so, by faith he sang of the day when “the whole earth [would] be filled with his glory” (Psalm 72:19).

Song in the South Seas

Two themes dominate the hymn the Tongans sang 160 Pentecosts ago: the universal reach of Jesus’s reign, and the unrivaled blessings of that reign.

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