Speaking after their win at West Ham, the Frenchman said: "If we carry on like this it gives us hope that anything is possible for the club.
"Nobody gave us a chance at the start of the season and that was fair enough because the last couple of years have been difficult for Arsenal and we didn't win anything.
"But now we have what was missing in the last two years. The spirit and desire to fight for each other is back. We were really looking forward to this game because every year we struggle here and this time we wanted to come here and do something positive.
"This is definitely the type of result we didn't get last season. The same as the 3-1 win at Tottenham in our last away game. Last season we lost only once at home but were let down by our away form. This time we are showing everyone Arsenal are up for it.
"If we can keep getting away results like this we can do something special because we will always be solid at home."