Lyric discussion by pods 

In the documentary Live Forever, Noel discussed that the song was about growing up in a lower class and about resisting, as debaser2002 mentioned, the 'i want to kill myself attitude'. It has a similar, although much more subtly said meaning as the Pulp's 'Common People' where these people are focussed on day to day living, and don't care 'how your garden grows'

Read this lyrics, and it is pretty evident... i think:

Maybe I don't really want to know How your garden grows I just want to fly Lately did you ever feel the pain In the morning rain As it soaks it to the bone Maybe I just want to fly I want to live I don't want to die Maybe I just want to breath Maybe I just don't believe

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