In this week's Torah portion it discusses a skin condition that would render the person impure and needed to leave the Jewish camp for a specified period of time or until the condition improves.
The Talmud tells us that this affliction would occur if someone were to gossip, steal, or was arrogant. In other words, this was a heavenly punishment for someone who was not exactly considerate of others.
It required an expert in this field of Jewish law to diagnose whether it was the exact color, size, and type that fit the bill. But interestingly the diagnosis was not pronounced by the expert, but rather by a Kohen - even if the Kohen himself was not familiar with the laws.
Why? Because one job that the Kohen had - and still has to this very day - was to bless the nation. The Kohen's whole identity was kind and loving. So while someone else might have enjoyed giving a snide remark to this character, or taken pleasure of sending him into "time-out", the Kohen would be able to sensitively inform this person that their behavior is not ideal and that they should improve. The kohen would build him up instead of tearing him down. The Kohen would ensure that the message of the leprosy was taken the right way, and would not rest until he helped this individual improve and become pure.
In our own lives, when we have something to critique about a friend, colleague, neighbor, or family member, let us make sure that we are doing it like a Kohen; with love, compassion, and care.