A person's perception is his/her reality

Listening to the Predident's speech in Dallas, I was moved by the tribute and memorial to the five policeman. I was equally touched by George W.,  Dallas Police Chief, Mayor. The absolute highlight was the Police Choir that sang "Battle  Hymn of the Republic."  

The President said many things that were memorable. One was that America is not as divided as we think and especially as some try to tell us. He professed a love of country which was very moving to me. He used a concept that is  important. Perception. A person's perception is his reality. What he belies to be true is true to him. The facts may be something else entirely. 

To me, this is what makes the "racial" situation relatively insoluble. Sad but true.