Finding the right balance and performing strongly in defence is what Arsenal must do tonight according to manager Arsene Wenger.
The Gunners face Barcelona in the Champions League after failing to secure top spot in Group F of the competition.
Mesut Ozil, Aaron Ramsey and Petr Cech will all return after skipping Saturday's FA Cup home draw against Hull City with Jack Wilshere, Tomas Rosicky and Gabriel Paulista still out injured.
"You sum up well our last experiences," Wenger told reporters.
"It is a good opportunity to show we have learned because it is true we have given ourselves a difficult task after the first home leg and maybe after we have been a bit too keen to make the difference in the first game.
"We need to find the right balance between being audacious because that is what you will need to be against Barcelona. We need to be strong defensively as a unit and not put ourselves in front of a very difficult task in the second leg.
"We are better equipped in the way we have assembled experience now. I believe all the players I have are intelligent and it is a good opportunity to show we have learned.
"They [the Barcelona forward line] are the most efficient.
"They are top, top class. Individually they have exceptional talent. The only way we can stop them is by being collectively resilient, having great solidarity and intelligence as well. Let's not forget we have a good defensive record and a great goalkeeper as well.
"When you see the other day that Messi scored his 300th [La Liga] goal in less than 340 games, I've seen many strikers in my life, but I've never seen a record like that.
"I remember we played the Champions League final against Barcelona in 2006. He [Messi] was injured at the time and couldn't play the final.
"That's where he started already to have a reputation. That's 10 years later, so it's remarkable what he has achieved between 2006 and now."
