This is the peak of what they've learned, their formal discipline of what they've mastered.

In the Greek mythology he flew to the sun and fell to his death in the ocean.

Well, you can always be a clown. (laughs).

Every mathematical discipline goes through three periods of development: the naive, the formal, and the critical.

I started my first company when I was 18 and learned by trial through fire, having no formal education or entrepreneurial experience.

Be master of mind rather than mastered by mind