Sir Alex Ferguson splashed out over £12 million to land the teenager in the summer, a clear statement of the regard the Scot holds the Portuguese international in.
The 19-year-old has shown flashes of brilliance this term, but has so far failed to display his form on a consistent basis.
Wily Scot Ferguson is convinced the youngster will be a success at Old Trafford and Ronaldo is determined to prove his manager right.
"I want to be one of the best players around in two or three years' time," said Ronaldo.
"I would be very proud if, one day, I'm held in the same esteem as George Best or David Beckham. It's what I'm working hard towards."
Ronaldo's tricks are stuff of legend, but he is learning to adapt his play to benefit his team-mates.
He added: "I am learning and listening to the opinions of those who have been there and done it, won leagues and cups."
Ronaldo has taken some rough treatment from opponents this term, but he has learned to bite his lip.
"When defenders think there is a player capable of creating danger, they try to stop him no matter what," said Ronaldo.
"And when you get fouled, there is no point in talking to the referee or to the other players.
"You have to get up and do what you need to do to get back into the game."
