Hart ended the season as a Premier League champion, playing the club's final 13 matches after re-establishing himself but not before a sustained period of uncertainty.
"That's football - it is what it is," he said. "I've got no right to play in every game whether that's for Manchester City or England, I know that.
"It was a bit more in the spotlight but I know that if your standards drop there are some very good players ready to take your place for both club and country.
"I just have to keep pushing myself to be the best.
"I just enjoy playing for my country. We have some fantastic talent goalkeeping-wise and have a great coach in Dave Watson. I'm fully aware that we have the likes of John [Ruddy], who's doing well at Norwich in a difficult season, Ben [Foster] has had a fantastic season at West Brom, Fraser [Forster] has kept clean sheet after clean sheet for Celtic, while Jack [Butland] wasn't getting game time at his parent club [Stoke] but was willing to go out on loan and is doing well in the Under-21s.
"I'm fully aware of what's around me and it's an enjoyable position to be in. I'm just fighting hard to keep it.
"Everything is so individual these days. There is so much riding in so many different things, you can't really afford to look back or look forward. You have to live in the present and try to live every moment as you can."
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