Harmony is You.

It is easy to fall back into discord, even after having realized the truth, if one allows others, who have not realized the truth, to distract you from the truth. Hence the saying. Be still so to know YOU are. In conclusion. Mingle with the world. Observe the world. But do not go so far to allow the distractions of the world to bring discord to you.
~ Wald Wassermann, Physicist