Messi was visibly in tears as he collected his silver medal following Argentina's narrow 1-0 defeat to Spain in Sunday's World Cup final, a moment that quickly resonated with football fans around the world.
Speaking on Fox Sports, Henry said the eight-time Ballon d'Or winner's emotions reflected his enduring passion and desire to succeed with the national team despite everything he has already achieved in football.
"Look at what it means to him. If you ever had any doubt about whether the guy still has any fire in his belly, look at him. Look at what it means.
"Look at this. Everybody's clapping because you are looking at him, and this is what it means to him.
"You won already. And look at the guy. Look at the passion, desire and the love that he has for his country and how much he puts into it."
Messi, who captained Argentina throughout the tournament, enjoyed another outstanding World Cup campaign despite the heartbreaking defeat in the final.
The veteran forward finished the competition with eight goals, playing a pivotal role in guiding Argentina to the final and once again demonstrating his importance to the Albiceleste.
Although Argentina fell short against Spain, Messi's performances and emotional response at the end of the tournament drew widespread admiration, with Henry's comments highlighting the relentless drive that has defined the Argentine legend's international career.