Final answer:
John 4:36 refers to gathering fruit for eternal life, using harvesting as a metaphor for evangelism and the winning of souls.
Step-by-step explanation:
According to John 4:36, the one who gathers fruit does so for eternal life. This passage reflects a spiritual metaphor where the act of gathering fruit represents the work of spreading the gospel and leading souls to salvation.
The fruit signifies the result of ministry work, essentially the souls won for God's kingdom, which culminates in eternal life for both the evangelizer and the convert. Reaping or sowing in terms of the spiritual work is to invest in what is everlasting beyond our earthly existence.