Winning breeds confidence. But winning a major? Surely that would've got the juices flowing much, much more.
Unfortunately for Thomas, who turned 30 on 29 April, the last 12 months have not yielded the results he would have been expecting. Probably demanding.
Related: JT 'not pleased' with his career
Thomas has four top-10s in the 19 events he has played. He also missed his first Masters cut in eight appearances when he failed to find the centre cup with a 15 footer on No. 18 at Augusta National after a disastrous finish.
His demeanour matched the miserable conditions in Georgia.
Speaking before his title defence at the PGA Championship at Oak Hill, Thomas delivered an insight into how frustrating the last year has been.
For example, has there been a point where he'd enter a tournament wondering whether he could win or thinking he couldn't?
"Yeah," Thomas said, adding:
Related: PGA Championship field
Thomas also revealed that he's now adopting AimPoint.
GolfMagic's Equipment Editor Alex Lodge recently had the opportunity to chat to putting coach Jamie Donaldson about this.
5 of the top 10 players in the world use AimPoint. Should you?— GolfMagic (@GolfMagic) May 15, 2023
We chatted to @golfdonaldson about all things AimPoint, and got to grips with it ourselves!
Make sure you tune in to our Instagram live on Wednesday at 7.30pm G.M.T where we talk to Jamie about AimPoint! pic.twitter.com/xSpBl1H8gw