Passage
And in your law it is written that the testimony of two men is true.
And in your law it is written that the testimony of two men is true.
John 8:15 You judge according to the flesh: I judge not any man.
John 8:16 And if I do judge, my judgment is true: because I am not alone, but I and the Father that sent me.
John 8:17 And in your law it is written that the testimony of two men is true.
John 8:18 I am one that give testimony of myself: and the Father that sent me giveth testimony of me.
John 8:19 They said therefore to him: Where is thy Father? Jesus answered: Neither me do you know, nor my Father. If you did know me, perhaps you would know my Father also.
The verse centers on "written", "testimony", and "true". It is saying that the verse draws attention to "written" and "testimony", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 16's "And if I do judge my judgment..." into verse 18's "I am one that give testimony of...", so "written" and "testimony" 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 "written" and "testimony" with trust shaped by these words, not by a vague optimism outside the passage.