$6$b$.$ Rodrigo writes the following: "I think...

Rodrigo writes the following. "I think this success is just the beginning. I consistently told our client that customer support was the key differentiator. When our client called me on the phone today, it was clear that this was a great selling point." He cringes re$-$reading the statement and edits it to the following. $"$We provide excellent customer support. Our client mentioned this was what set us apart from our competitors. We should be proud of our ability to provide such high$-$quality support to our clients and customers."

What principle is most relevant in this change?