Jesus' judgments are perfectly just because they are perfectly aligned with the Father's will. He has no self-interest, no bias, no agenda. This is what makes Him the perfect judge.
Memory phrase: Jesus seeks the Father's will, not His own.
Talk about it: Jesus says His judgment is fair because He seeks the Father's will, not His own. What makes a person's decisions unfair? What makes them fair?
Prayer: Jesus, help me to seek God's will rather than my own — just like You did.