The Blaugrana midfielder has discussed how fighting on numerous fronts is not an easy task, while also commenting on how the current set of players will miss Pep Guardiola
Although the Blaugrana missed out on the Champions League and La Liga titles last season, the Spain international enjoyed personal success, recently winning Uefa's award for best player in Europe after helping Spain win Euro 2012.
"It appears that when you win everything, it seems normal and easy, but it is very difficult," the midfielder told GolTV.
"The challenge is wanting to improve, wanting to keep winning championships."
While Barcelona have enjoyed a solid start under Tito Vilanova, Iniesta acknowledged that the squad will miss former coach Pep Guardiola.
"With him we reached the top and also we enjoyed ourselves a lot. I think that's paramount. We enjoyed everything, every workout, every game, and we learned a lot and will miss him in that sense."