At least the idea is the same. Feroldi has been followed for a long time, and I’ve probably seen a message from there sometimes. However, it’s such an old wisdom that I don’t believe it’s actually his “original.” It’s certainly not mine 
For me, it has come to mind again through ball sports, where the form is “you control your performance, not the outcome.” As there’s also an opponent there. So, also an old thing in athletes’ mental coaching. I’ve been pondering similarities to investing recently.