Don’t…pay any attention to what Lord Henry says. He has a very bad influence over all his friends, with the single exception of myself.

– Oscar Wilde

The Picture of Dorian Gray, Chapter 2. Basil warns Dorian to ignore what Lord Henry says, as he is a bad influence on on all of this friends. The painter knows that words are important and he worries that Henry, with his famous wit and charming way with words, will lead Dorian astray and corrupt him.