"I want more," the forward told a press conference before training with the national side at Oeiras, on the outskirts of Lisbon, ahead of upcoming European Championship qualifiers.
"As long as I play I want to set the bar very high, I have to think big," continued Ronaldo.
Ronaldo marked his 200th international cap last June by scoring the only goal in Portugal's victory over Iceland, which allowed the Selecao to stay top of Group J in Euro 2024 qualifying.
On Friday, the 2016 European champions will play Slovakia in Bratislava and Luxembourg three days later at the Algarve stadium, in the south of Portugal.
"I really want to win these two matches. If we win we will practically qualify," said the five-time Ballon d'Or winner.
Asked about his rivalry with Argentina's Lionel Messi, Ronaldo replied that the two "respected each other" and he believes they have "changed the history of football".
Ronaldo this year marks his 20th anniversary in the national side, saying he was "proud" of this "longevity".
"I want to continue because I feel good and useful but anything can happen," he said, adding for now he wanted to "enjoy the moment" and set himself the goal of "having an excellent Euro".
