"I should have been paying more attention. I wish I did now. But I was talking to a mate about the weekend footy ... and she grabbed me and she told me I should start listening more because I wasn't going to make a career out of football.
"I still remember that day and I remember thinking 'I'm going to prove you wrong' — so I did."
Smith is so physically unassuming as a footballer he has been dubbed 'The Accountant'. But Smith believed that may be the key to his remarkable longevity.
He has missed just one Origin game since his 2003 debut.
"A lot of people look at my body and call me 'The Accountant', saying I'm not a real typical body shape for a rugby league player," Smith said. "But maybe that's got something to do with it as well.
"I've never been the biggest or the fastest so I've had to be a bit quicker between the ears and maybe that's helped me get around the field and stay in the matches every week."
His secret is definitely not yoga.
"I just put it down to training hard and preparing my body physically ... [but] there's no doubt that you need a bit of luck along the way."
Smith (298) has Lockyer's NRL games record of 355 in his sights.
- AAP