The quote, "I am the light of the world, whoever follows me will not walk in darkness, but will have the light of life," is found in John 8:12.

Jesus uses the metaphor of "light" to represent divine truth and guidance. "Light" represents the spiritual truth and the presence of God, while "darkness" represents sin, ignorance, and separation from God.

By following this "light," a person gains the "light of life," which refers to the spiritual understanding (knowledge of God) that guides a believer away from the death of sin and toward eternal life (salvation).