Final answer:
In John 4:14, Jesus offers 'living water' that becomes a spring of water leading to eternal life, symbolizing spiritual sustenance and salvation.
Step-by-step explanation:
According to John 4:14, the water that Jesus gives to someone will become in them a spring of water welling up to eternal life. In this passage, Jesus is speaking to a Samaritan woman at Jacob's well, offering her not just physical water but spiritual sustenance that leads to eternal life. This 'living water' is a metaphor for the spiritual nourishment and salvation that Jesus offers, which, unlike ordinary water that satisfies temporarily, provides eternal satisfaction and life.