Words as weapons

"Words as weapons" is actually the name of the song performed by Birdy. I listen to this song quite often as I like the lyrics and the music. The thing that I especially like about this song is to be strong enough not to let the word blades hurt you and weaken you. I like the idea but it is somehow difficult to apply to real life situations. :( How often can you find the strength not to pay attention to what people say to you with the intention to make you small or diminish your achievements? How do you usually respond?