Wilshere, for many, was the best player on the pitch.
"I watched these (Barcelona) players in the World Cup and they were the best team there, so I knew a bit about them before the game. But once you get into a game, you get used to them," Wilshere said.
"We had to go up a level in the second half and we passed it around better. We had to carry on playing the Arsenal way and we did that."
The second leg at Camp Nou on March 8 will be another special experience for Wilshere, whose ability at such an age was compared by England manager Fabio Capello last week to that of football greats Raul, Franco Baresi and Paolo Maldini.
"We have got something to hold onto," Wilshere said. "Last year, it was 2-2 (after the first leg of Arsenal's quarter-final against Barcelona). This year it's 2-1 and we have a chance. If we get a goal over there, we will see what happens."