Hmm, now that phrase looks familiar to me! :-)
I came across it recently again via this site. You can go there to read the complete essay for yourselves. Here's what the first paragraph has to say, which I think mirrors quite closely the sentiment expressed in "The Peace Within" song.
If we are to have true peace in the world, we must first find it within ourselves.
Most people agree that a more peaceful world would be an ideal situation for all living creatures. However, we often seem stumped as to how to bring this ideal situation into being. If we are to have true peace in this world, each one of us must find it in ourselves first. If we don’t like ourselves, for example, we probably won’t like those around us. If we are in a constant state of inner conflict, then we will probably manifest conflict in the world. If we have fighting within our families, there can be no peace in the world. We must shine the light of inquiry on our internal struggles, because this is the only place we can really create change.









