Can anyone defeat Aussies in CRICKET?

According to me the teams which have the capability to beat Australia are New Zealand in one day match and India in tests and T20 games and Australia may be the world champions but they sure are beatable, and considering the downfall this side is experiencing the day is not far when Australia will be zero from hero

i just dont want to believe it...... uastralia have won the final of the cricket world yet again..... and this is the third time in a row...and the fourth time in all..... how.... how ...how....what do they eat... what do they think.... what is it that the whole world lacks.... or infact.... what is it that australians have and the others dont..... i know one thing.... they have been consistent.... the first of the three last world cups.... against pakistan... australia defeats it....australian bowlers ...all out pakistan for 125..... the next world cup... ponting, and hay den and symonds.... smash indian bowlers and the australians go ahead making about 350.... mygod.... 90% of the game won then and there..... and then bowlers like mcgrath and lee..... do their job of handling the best batting lineup in the world.... indians are defeated..... and then comes the 2007 worldcup.... they did it again... scored a total...which teams score in 50 overs.... and the australians did that ni just 38..... what a knock by gilchrist.... 150 on a world cup final... is brillian..... no pressure seemed to be on him while he was hitting those sixes..... as the whole australian batting line up was behind ... to take over.... incase he fails..... srilankans... could nt handle the bowling attack.... .and australia win it again.... i dont say i wasnt sad... when they won..... but it did feel... if a team ....plays like how the australian do... even god wont be able to find a reason...to why it should be defeated........ i guess ... they will keep winning the finals for another three time now..... thats my prediction....