The old saying about "sticks and stones" causing harm while "words" can not or do not is, of course, hogwash.
Over the course of our lives we have the opportunity to either say or write things that shape friendships, solve problems, or salve wounds, both real and imagined. Words also can cause divisions, create problems, or leave lasting hurts, whether real or imagined.
Words can and do define us, especially those put in writing for posterity.
As this poet wrote: