What does the writer mean by writing the last sentence "But, it was everything"?

作者写的最后一句话 “But， it was everything” 是什么意思？

youdao

From the outside, not very much had changed, and so when it was my turn to offer news I simply said that everything was fine and that I was still writing.

从外界看来，没有太多的变化，所有轮到我介绍的时候我只是说一切都还好，我还在写作。

youdao

Over the years, Salinger told me about working “long and crazy hours” at his writing and trying to stay away from everything that was written about him.

塞林格在过去的年月里告诉我，他花费了“漫长而疯狂的时间”写他的作品，并试图远离一切描写他的文章。

youdao

While my memory is still fresh, I summarize in writing everything that was agreed upon in a meeting or phone call and send it to all the participants.

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So when I saw that element continuing to resurface in almost everything I was writing, I have to find a way to be at peace with the fact that that was going to be smoke in the room of every song that I was working on unless I somehow acknowledged it.

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Years later he was there to do a signing himself, after writing Everything (A Book About Manic Street Preachers).

BBC: Magazine