"When someone says you can't do what you know you can do, then you can't do anything"

This quote by fashion designer Isaac Mizrahi talks to the power of self-belief and determination. It recommends that when somebody doubts our abilities and informs us we can't do something, it can be disabling and make us feel like we are incapable of achieving anything. Mizrahi is highlighting the value of believing in ourselves and our abilities, even when others might doubt us. He is also stressing the unfavorable effect that others' words can have on our self-perception and inspiration. Eventually, this quote serves as a tip to rely on our own capabilities and not let anyone else's doubts hold us back from accomplishing our objectives.