The Hoops travel to Turin on Tuesday with only the faintest hopes of stunning the Old Lady in Wednesday's last-16 second leg following their 3-0 defeat in Glasgow last month.
But Lustig, who will remain behind in Scotland alongside captain Scott Brown after both picked up injuries, realises a gung-ho approach will only see the Clydesdale Bank Premier League champions cut open again.
Celtic conceded early in the first leg as Alessandro Matri pounced and were then hit with two late sucker-punches when Claudio Marchisio and Mirko Vucinic both struck as Neil Lennon's men desperately sought a goal to take with them to Italy.
Having learned that harsh lesson, Lustig believes the manager will have to remain cautious - even given Juve's commanding lead.
He said: "We need to try to go forward and score some goals, but if we are too open in how we think, then Juventus are a really good team and will have a really good chance to score. So we will need to take it a little bit easy."
Meanwhile, former Celtic assistant manager John Robertson reckons Celtic can be proud of the work they have done on the continent this year.
Martin O'Neill's former right-hand man has been impressed with a set of performances that included the club's first-ever away win in the Champions League group stages against Spartak Moscow and that famous Parkhead victory over Barcelona.
Robertson said: "Getting to the last 16 was an incredible achievement because, in my opinion, the Barcelona team are the greatest that has ever been. So, for Celtic to overcome them - and nearly get something in Barcelona too - was fantastic. A fabulous achievement.
"Their escapades in Europe have really brought the club to the forefront again. People must have looked at that Barcelona result and thought, 'Well that Celtic must be a decent team'. Can a miracle happen in Turin? Realistically, everybody will tell you no. But until the tie is over, there has to be hope. Why can't we go over there and get a result?"
