Every day every person judges, perhaps subconsiously, every person they meet.
You might judge someone you meet for the first time as a chav because of the way they look or speak.
You might judge someone as unwell because of the bags under their eyes that weren't there yesterday.
You might judge someone as happy because of the bounce in their steps.
Everyone judges, and it's impossible to avoid it. You might not admit to it, or even realise you are doing it, but you do. Very basic psychology....