"Everyone may not be good, but there's always something good in everyone. Never judge anyone shortly because every saint has a past and every sinner has a future."
Not only is judging wrong, but it also opens a scope upon ourselves opening up our own lives for examination when we are willing to do so. Not everything that everyone is willing to do may be good, but that doesn't mean that there is no good whatsoever in the person.
When we go through life we have to remember that everyone has a past. There are many who we will see who we have no clue of the things that went on in their pasts to help make them who they are today. People may have experienced things in their lives that we could never imagine. Sure, your past shouldn't be what determines your future, but we have to be willing to see the good in people regardless of how we think we can judge them, because we will never be able to correctly judge another person.