Passage
And if also I judge, my judgment is true, because I am not alone, but I and the Father who has sent me.
And if also I judge, my judgment is true, because I am not alone, but I and the Father who has sent me.
John 8:14 Jesus answered and said to them, Even if I bear witness concerning myself, my witness is true, because I know whence I came and whither I go: but ye know not whence I come and whither I go.
John 8:15 Ye judge according to the flesh, I judge no one.
John 8:16 And if also I judge, my judgment is true, because I am not alone, but I and the Father who has sent me.
John 8:17 And in your law too it is written that the testimony of two men is true:
John 8:18 I am [one] who bear witness concerning myself, and the Father who has sent me bears witness concerning me.
The verse centers on "judge", "judgment", "true", "alone", "father", and "sent". It is saying that the verse draws attention to "judge" and "judgment", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 15's "Ye judge according to the flesh I..." into verse 17's "And in your law too it is...", so "judge" and "judgment" 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 "judge" and "judgment" with trust shaped by these words, not by a vague optimism outside the passage.