# I have come into the world

Here "world" is a synecdoche that refers to the people who live in the world. (See: [[rc://en/ta/man/jit/figs-synecdoche]])

# testify to the truth

Here "the truth" refers to the truth about God. Alternate translation: "tell people the truth about God" (See: [[rc://en/ta/man/jit/figs-explicit]])

# who belongs to the truth

This is an idiom that refers to anyone who loves the truth about God. (See: [[rc://en/ta/man/jit/figs-idiom]])

# my voice

Here "voice" is a synecdoche that refers to words Jesus says. Alternate translation: "the things I say" or "me" (See: [[rc://en/ta/man/jit/figs-synecdoche]])