How did this boy from the bush become head of the highest court in the land?

And the work experience for me was in a local solicitor's office.I sat in the solicitor's office, and I also went to the local Court of Petty Sessions [Magistrates Court], and I thought, "This is a pretty interesting process" So, I chose to go to the Australian National University in Canberra.I confess to have been a little surprised to find myself in law school in first year, studying a subject called Legal Method, and I was actually extremely good at it