Arsene Wenger thinks players of today have more pressure mounted on them, unlike the way it used to be in the past.
The Gunners are third in the Barclays Premier League table and are also into the semi-finals of the FA Cup after they beat Man United 2-1 at Old Trafford.
They also face a tough test against French side Monaco in the Champions League - hoping to turn their fortunes in the competition around at the Stade Louis II.
And, the Arsenal boss thinks players need to be strong enough to show they have the character to pass through tough times.
“We can only help so much, 99 per cent is down to the individual,” Wenger told Arsenal Player.
“We can push them over the line with the one per cent we can give, but 99 per cent is them having the responsibility to make their own life.
“You have to stand up to be strong enough, to fight, to show that you have the courage and that you’re not inhibited because you’re under pressure, and that’s the difficulty of the modern player.
“That has increased and the resistance to stress from the young players is immense today because everything is analysed. Every pass you make, every first touch, how far you run, how much you fight, everything.
“There is a verdict on everything so that kind of stress has increased and it’s much more difficult to deal with than it was a few years ago.
“Twenty years ago you could lose a game and people would say, ‘Next time Arsenal will play better’. Today you lose a game and it is always a crisis. It’s not easy for the players to deal with that.”