Barca must overturn AC Milan's 2-0 aggregate lead to reach the Champions League quarterfinals tonight.
"We aren't looking to shut up the critics," said the Spain international.
"We are the leaders in La Liga, 13 points ahead of second place. Real knocked us out in the Cup, but this can happen as they are a great team.
"The season has been brilliant. We want to win, for ourselves and for the fans. Not for all of you, to silence the critics.
"People have short memories. We have changed history in recent times, under Frank Rijkaard and Pep Guardiola.
"Only 10 or 12 years ago the fans went mad when a last-minute goal from Rivaldo qualified us for the Champions League. People should have confidence in this team. They have earned it."