Passage
The same came for a witness, to bear witness of the Light, that all men through him might believe.
The same came for a witness, to bear witness of the Light, that all men through him might believe.
John 1:5 And the light shineth in darkness; and the darkness comprehended it not.
John 1:6 There was a man sent from God, whose name was John.
John 1:7 The same came for a witness, to bear witness of the Light, that all men through him might believe.
John 1:8 He was not that Light, but was sent to bear witness of that Light.
John 1:9 That was the true Light, which lighteth every man that cometh into the world.
The verse centers on "light", "same", "came", "witness", "bear", "through", and "might". It is saying that the verse draws attention to "light" and "same", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 6's "There was a man sent from God..." into verse 8's "He was not that Light but was...", so "light" and "same" belong inside that flow. In John context, the local focus is the identity of Jesus, new birth, eternal life, and belief and unbelief.
A plain takeaway is to answer the verse's own emphasis on "light" and "same" with trust shaped by these words, not by a vague optimism outside the passage.