On Thursday (Friday AEDT), Kane will become England's most-capped player in history when he leads his country out against Croatia, a 126th cap to surpass goalkeeper Peter Shilton's landmark being the latest remarkable step on his continued rise to the pantheon of great players.
All this from a man who's faced questions about how good he is throughout his entire career, starting from his release from Arsenal as a child.
He faced tough loan spells in the Football League, was branded a one-season wonder after a prolific campaign for Tottenham and then people raised an eyebrow when he said he wanted to become a World Cup Golden Boot winner.
Now the 33-year-old has just been voted the best player in the world after a decade of consistent performances, but he's using the feeling of being doubted to ensure he ends his career with no regrets.
Asked if he still had a point to prove, he said: "I think so - I don't think that will ever leave me.
"It's probably part of what makes me push myself to the limits that I do because in football, you've never completed it, really.
"No matter what you've achieved, there is always a trophy that someone else has won or a goal record that someone else has or whatever it may be, I think there's always something.
"My biggest fear is finishing my career and thinking I could have done a bit more if I could have just done that or done that."
"I want to make sure that I cross every bridge and do everything possible so that whenever that day does come, I can say I've done everything possible.
"I think it's just my mindset, because I've maybe had to prove people wrong my whole career.
"From early academy days proving coaches wrong, proving scouts wrong – it has just been installed in me.
"I think if someone tells me I can't do something it just motivates me more to do it. You of course have to combine the mentality with the actual product and being able to produce it."
Kane does not see winning the Ballon d'Or as the pinnacle and wants to set targets for the next set of players to catch.
"When you look at Jude (Bellingham) and Dec (Rice), for example, they're on 60-odd caps already and how young they are. So I'll try and give them a good number to catch.
"The goal record, of course, is going to be one that's difficult to beat for a while, I think that's good."
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