Confidence isn't optimism or pessimism, and it's not a character attribute. It's the expectation of a positive outcome.
"I don't want to just be an artist. I want to be a great artist."
Your time is limited, don't waste it living someone else's life. Don't be trapped by dogma, which is living with the results of other people's thinking. Don't let the noise of others' opinions drown out your own inner voice. And most important, have the courage to follow your heart and intuition. They somehow already know what you truly want to become.
"Writing is a way to make sense of our struggles."