Lewis Hamilton believes he could win the world championship in his first season in Formula One.
Hamilton celebrates after his second place in Spain
The Englishman heads the standings from McLaren team-mate Fernando Alonso after finishing second to Ferrari's Felipe Massa in the Spanish Grand Prix.
"If I keep scoring points and the team remain competitive and consistent then anything is possible," he said,
"It is my first season so I have to expect some ups and downs but I believe I can stay in a strong position."
The 22-year-old is two points ahead of Alonso, the reigning world champion, and a further one clear of Massa, who in Spain won his second consecutive race.
Hamilton extended the record he set at the last race in Bahrain for consecutive number of podiums at the start of a career.
I am living my dream after working so hard for this
And he has taken over from Bruce McLaren, founder of the McLaren team, as the youngest driver ever to lead the world championship.
"It is just an amazing feeling," added Hamilton.
"I don't want to make any predictions and I am happy to just keep on doing this and scoring points and let's see what happens."
Hamilton drove another mature race to take his fourth consecutive podium finish in as many races.
Starting fourth, he passed Ferrari's Kimi Raikkonen off the start, and then moved up to second when Alonso ran wide in the first corner trying to pass Massa.
"At this track, you cannot overtake so the key is to get the best position you can at the first corner," said Hamilton.
"So the aim was to get as many places as possible and fortunately I got past Kimi, but Fernando and Felipe touched and I was able to get past Fernando, who was very close.
"When he came back on he nearly hit me but we managed to pull it off.
Hamilton enjoys the champagne after breaking another record
"We didn't have the pace of Felipe but we are another step closer and as I said to him just now we will get him soon.
"He [Massa] built a good lead and pitted ahead of me and I knew I would be quick and gain some seconds, so I pushed but my middle stint was not great and at the end we were fast again.
"I think it all went pretty well and the team did a fantastic job over the last four weeks and I am very pleased for them.
"I am living my dream after working so hard for this. To come out of my fourth Grand Prix, leading the championship, is just incredible for me."
Hamilton will face his toughest test yet at the next race, in Monaco in two weeks' time.
The Englishman has won on the streets of the Principality in both Formula Three and GP2, but in an F1 car the track is one of motor racing's greatest challenges.
"Monaco has always been a very strong race for me. I think we'll be very strong in Monaco so I'm looking forward to it," he said. "Sure, I'm going to be gunning for a win."