Have you sometimes seen people trying to make you feel like you can't do something?
For example to play the 1st violin part? Or that concerto? Or undertake a project of your dream? That maybe you even do not merit?
Unforrtunately, poisnous people do exist.
Do Not Live Your Life By The Limitation Of Others.
There is a way of dealing with that, after all, poor poisnous people! They probably have nothing worthile to do.