John 4:36-38 WEB
He who reaps receives wages, and gathers fruit to eternal life; that both he who sows and he who reaps may rejoice together.  For in this the saying is true, ‘One sows, and another reaps.’  I sent you to reap that for which you haven’t labored. Others have labored, and you have entered into their labor.”
Jesus is telling his disciples they are about to reap a harvest that another planted. Jesus and the disciples are waiting for the Samaritan woman and her countrymen to return. While they are waiting Jesus lets the disciples know what is about to happen (Jeremiah 33:3). In the preceding verses, we get the idea that the disciples do not like what Jesus is doing (John 4:27). The disciples’ prejudice towards Samaritans would have caused them to walk through the area without stopping. That same prejudice has their minds dulled but Jesus tells them plainly what is about to happen (John 4:33). Namely, the disciples’ are about to reap a harvest of souls that they did not sow (John 4:39-42).
This passage brings so much hope to those who labor to see the lost won for Jesus. It does not matter if we are planting, watering, or reaping. We all share the joy with Jesus when a lost soul is saved from damnation (Romans 2:7, Proverbs 11:23-25). For this reason, we must both wait and labor with patience. How we wait matters. We should be in a posture of readiness as we wait (1 Corinthians 9:22-23). Thus, we present ourselves ready to labor in every situation so that some may be saved. That interaction with the sales clerk matters. That interaction with the postal worker matters. That interaction with the person who cut you off in traffic matters.
It matters that we do not uproot the work in the lives of people that others have planted and watered. It is important that we recognize God desires all people to be saved (John 3:16). So, how we treat all people matters. Holiness matters. We should be putting our best selves out for all people, not just those who can do something for us. Our most significant contributions may be bringing smiles to those that serve us out in the marketplace. You are meant to be sharing Christ, so it seems reasonable that many of the people you interact with recognize you are a Christian (Matthew 6:20-21).
Lord Jesus, please forgive me for not recognizing the immeasurable worth of the people around me both at home and in the marketplace. Please help me represent you well and have a word of salvation for all people. Please help me not uproot what others have planted and watered. In Jesus’ name, I pray, amen.