Barca thumped Sevilla 5-2 on Sunday, with Raphinha hitting a hat-trick.
The Brazil attacker said afterwards: "It's important to play at home. Obviously, we want to win every game, but at home we have a different advantage.
"The fans support you. We have two more games left and we hope to play them perfectly, or almost perfectly, and achieve good results.
"We controlled the game well. The three goals in the first half helped us a lot. I think we played very well, although we need to pay more attention at the end of each half, as we conceded two goals.
"Overall, it was a spectacular match, but we have to minimize mistakes. Playing like this, it's difficult for anyone to beat us."
On Panenka penalty, Raphinha added, "I change the execution a little to confuse the goalkeeper. They study the penalty takers, and one way to surprise them is to vary the way you strike the ball."