It is an individual's choice what the effect of verbal bullying has.
If a verbal attack destroys you, that is your choice.
The best response to nonphysical bullying is no response. Do not engage the bully. Stay away from someone who is a bully, leave if someone is bullying you, or if you can't do either of the above then ignore the bully.
Completely agree with both David. Bullying will affect us only if we let it.
Bullies bully us to get a reaction, if we just ignore them, they will feel frustrated.