The diminutive forward has often been criticised for his displays for La Albiceleste, with many critics of the belief that the 24-year-old does not give his all at international level.
Pressure is mounting on Argentina, who have not won an official title since 1993, but Messi is confident that things will soon change.
"A dream? To win the World Cup and the Copa America. That is what I am missing and I am convinced I will do it," Messi told the Argentine Football Association (AFA)'s magazine.
"I would be delighted to win a title with the national team. But it is clear I have nothing to prove, I have always been willing to help and it will always be like this.
"I do not feel I owe anything to anyone, let us make that very clear. I am simply one more player on this team who wants the best for Argentine football.
"Little by little, our team is growing."
Messi went on to comment on club matters, describing his Barcelona team as the strongest side in the world.
"Honestly, you cannot compare, it is not worth it," he noted. "Barcelona have the best in the world.
"Those who support Barca and those who do not admit it. This is the result of many years of work with the same team-mates.
"With Argentina, on the other hand, we have unfortunately not been able to achieve the results we wanted. There have been many coaches and we are starting from scratch."
Starting last month and continuing all through January, Goal.com will publish extracts from Graham Hunter's highly-anticipated book, 'Barca: The Making of the Greatest Team in the World'. In the latest extract, he looks at Pep Guardiola's early beginnings at Barca B in the Spanish third division ahead of his meteoric rise to world domination with the first team. Don't miss it!