“Let not the missionary be afraid, even if for thousands of years to come there should be little apparent success to the preaching of the gospel. If the Lord should tarry another six thousand years, ay, sixty thousand years—and he may—we are still to go on working, and still to go on labouring, looking for his coming, and expecting it, but not relaxing our efforts because he pleases to delay it, for the Lord has sworn that all flesh shall know his glory, and you may depend upon it, there is no spot of earth that shall be left to be Satan’s dominion. It shall be conquered for Christ, and in truth he shall ‘see of the travail of his soul, and he shall be satisfied.’”
Spurgeon