Self-determination theory (SDT) helps to understand human motivation in various settings (education, sports, health care, …) and has been developed and applied for four decades now. This week I had the privilege to attend the SDT-conference with almost 800 professionals who adhere to, research, or apply this theory. A real gift to hear keynotes from the SDT-heroes Deci, Ryan, and Vansteenkiste and to present myself at this conference.