The versatile midfielder turned down the Scudetto holders in the past, while he is not getting carried away by the Nerazzurri's fine start to the 2013-14 campaign
The Colombia international has developed into a key player at the Nerazzurri since his transfer in January 2012, but he could have ended up at their arch-rivals instead as the Bianconeri were supposedly keen to sign the 27-year-old as well in the past.
"During my time at Porto, I turned down the chance to sign for Juventus in order to move to Inter," Guarin told La Gazzetta dello Sport.
The midfielder was heavily linked with a move away from Inter ahead of the 2013-14 campaign, but he has insisted that a transfer was never an option for him.
"I have always said that all I want is to win silverware here," he declared.
Guarin then went on to discuss Inter's title credentials and made it clear that they still have a long way to go before they can call themselves contenders.
"We have gotten some important results so far, but there's still something missing," the versatile midfielder mused.
"We're on the right path, but we still have a long way to go. We have not done anything yet.
"It is an advantage that we don't play European football. There's less travelling, which gives you time to work on certain small things."
Inter currently sit fourth in Serie A with 14 points from six games, trailing leaders Roma by four points.