In the sections of the Doctrine and Covenants used for this lesson the Lord states repeatedly that the field (the world) is ripe and ready to harvest. In one of the sections he uses the phrase “already to be burned” (D&C 31:4). If you recall in Jacob 5 in the Book of Mormon the Lord of the vineyard worked tirelessly for a long time to salvage all the fruit he could from the trees he had planted. But when he was finally running out of time, it was then that he had his servant go and call other servants to help with the work. Here is Jacob 5:70–72.
70 And it came to pass that the Lord of the vineyard sent his servant; and the servant went and did as the Lord had commanded him, and brought other servants; and they were few.
71 And the Lord of the vineyard said unto them: Go to, and labor in the vineyard, with your might. For behold, this is the last time that I shall nourish my vineyard; for the end is nigh at hand, and the season speedily cometh; and if ye labor with your might with me ye shall have joy in the fruit which I shall lay up unto myself against the time which will soon come.
72 And it came to pass that the servants did go and labor with their mights; and the Lord of the vineyard labored also with them; and they did obey the commandments of the Lord of the vineyard in all things.
A scriptural take on doing missionary work
Might, mind, and strength
8 And it came to pass that he said unto them: Behold, here are the waters of Mormon (for thus were they called) and now, as ye are desirous to come into the fold of God, and to be called his people, and are willing to bear one another’s burdens, that they may be light;
9 Yea, and are willing to mourn with those that mourn; yea, and comfort those that stand in need of comfort, and to stand as witnesses of God at all times and in all things, and in all places that ye may be in, even until death, that ye may be redeemed of God, and be numbered with those of the first resurrection, that ye may have eternal life—
10 Now I say unto you, if this be the desire of your hearts, what have you against being baptized in the name of the Lord, as a witness before him that ye have entered into a covenant with him, that ye will serve him and keep his commandments, that he may pour out his Spirit more abundantly upon you?