The Catalan club suffered a surprise defeat at Ajax in the Champions League last Tuesday and just five days later their unbeaten start to the Primera Division was ended by Athletic Bilbao.
Barca now lead the league on goal difference only from Atletico Madrid, leading to some criticism of the squad and their ability to cope in the absence of injured star Lionel Messi.
However, Iniesta has played down the defeats and sees no reason why morale among Gerardo Martino's men would be affected.
"This is a race and you have to stand up and try and be better," the Spain international told Marca.
"This team are not one iota less confident than two weeks ago.
"I am human, I don't like extremes and I like to see things in perspective and balanced.
"Sometimes things don't go how you want, not for lack of anything but because circumstances don't allow it.
"There is concern when you lose but you try to put things right.
"Nobody likes to lose, do things badly or less well, but we can be confident that what we are doing is improving and everything looks good for the future."