In Matthew 9 we read the following:
35 And Jesus went about all the cities and villages, teaching in their synagogues, and preaching the gospel of the kingdom, and healing every sickness and every disease among the people. 36 But when he saw the multitudes, he was moved with compassion on them, because they fainted, and were scattered abroad, as sheep having no shepherd. 37 Then saith he unto his disciples, The harvest truly is plenteous, but the laborers are few; 38 Pray ye therefore the Lord of the harvest, that he will send forth laborers into his harvest.
The work of the laborer to bring in the harvest in the time of Jesus was a long day of hard,physically demanding work. 
Nonetheless, it needed to be done in a timely manner lest the harvest be lost and all the work that went into producing the harvest be lost as well.
In 1 John 4 we read of God’s great love for each of us. A love so great that He sent His only begotten Son as a laborer into the fields of our world.
7 Beloved, let us love one another, for love is of God; and everyone who loves is born of God and knows God. 8 He who does not love does not know God, for God is love. 9 In this the love of God was manifested toward us, that God has sent His only begotten Son into the world, that we might live through Him. 10 In this is love, not that we loved God, but that He loved us and sent His Son to be the propitiation for our sins. 11 Beloved, if God so loved us, we also ought to love one another.
As Jesus was moved with compassion when he looked out over the multitude scattered, lost without a shepherd, we should also be moved by compassion when we look out over the harvest set before us. Can we love great enough to go into the fields and do the hard work so that the harvest is not lost? Pray and be mindful of those who labor in the harvest.