Creation from the right place

C: I told my father that I do no want to work in his company. I want to create a business that in 5 year will generate USD 1M. He laughed and said “Let me coach you.”
T: He laugh at me and hesitates in my potential
F: hurt
A: finish the conversation, go to another room, start to think “what if he’s right, maybe, I’m not smart and capable enough”
R: not show up as I want, lose my confidence, being in pain

I do really want to prove that he’s wrong. But I want to make it from the place of love and creation, not from the place “I should do it no matter what just in order to prove he’s wrong.”
How would it be better to generate this emotion and keep working on my goal despite all his comments and laugh?
Many thanks!