They will tell you that you can't move mountains. They will say that you can't cross seas.
That you can't dig deep and realize your own seeds of greatness and plant them to become better.
They tell you all of this because they love living in their comfort zone.
And because you want to do something, they lash out and criticize you.
But that's just their insecurities talking.
Find what makes you passionate and do you. And do it because they said you couldn't.