The only reason to be in politics is public service. There's no other reason. Frankly, if that's the best job you can get in terms of money, that's too bad, you know. Because frankly, it's not well paid, everyone knows that. So for most people it's a big sacrifice.

It is unmanly. It is not some expression of macho virtue. It is the absolute antithesis of this. Real men don't bully women and children. Respect for women ... is so important.

You will never find a better friend to the United States than Australia.

While our energy efficiency is improving, there is a very high correlation, almost near perfect correlation, between GDP growth, and energy usage.

You cannot keep on saying oh, you know, talking about disrespecting women as just being politically correct or it's not a big deal or brushing things off. You've got to be aware of it.

In economics, one of the most important concepts is 'opportunity cost' - the idea that once you spend your money on something, you can't spend it again on something else.

When politicians offer you something for nothing, or something that sounds too good to be true, it's always worth taking a careful second look.