The goalkeeper has played club football for more than two decades and his been a mainstay for Australia since his debut in 1993.
Schwarzer is still excelling for club and country at the age of 39 and, despite having played 27 Fulham matches already this season, refuses to acknowledge tiredness as an excuse for players.
"It's one of those things," said Schwarzer, who faces Liverpool at Craven Cottage on Monday. "When people ask me about the national team and the amount of travelling and the number of games that we play, for me it's all about a mental approach and a mind set.
"You've got a long time to recuperate after you've finished playing. When you talk about the demands of the English Premier League, yes they are tough.
"But you're playing in one of the best leagues in the world and do you expect any different? I don't have to play for my national team. I want to play for my national team, if I'm selected, as much as possible. It's an honour."