Victory against Aston Villa today would put the Gunners within a point of the top four.
Wenger said: "I am in a strong mood because if I am not I don't see how my team can be.
"I have enough experience to know you have to deal with all kinds of situations and this is one that is difficult.
"But it's also a good opportunity to show that we have strength.
"We are fighting for a Champions League place, not against relegation and we have to take that in a positive way if we are to stay at the top."