First Grownup-ish poem

This was written, like many others, behind an exam question paper. In Grade 5. I surprised myself with this, I sounded so grown up compared to my age and previous poems.
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Time

I’m not really writing this poem…

My words just fall into rhyme

As I look back and see the footprints

In the sands of time.

So many people have gone by,

So much knowledge they’ve sought,

So much they have ‘known’

And so much they have ‘taught’…

But we really didn’t learn anything,

                I know not why—

The leaves of the trees seem to say

As the wind blows by,

“Some day we shall learn

As the years go by.”

So many questions have been answered

And many more asked;

We have searched high and low

But truth still remains masked…

We haven’t gained anything really,

                I know not why—

The oceans seem to say

And the waves seem to cry,

“One day we shall gain a lot

As the years go by.”

I have flown in the sky with the birds,

Burrowed in the ground with the mice,

Sung in the meadows with the cowherds;

It was all so smooth and nice…

But now things do not seem so fine,

                I know not why.

I can just say

With a deep sigh,

“Things shall be fine again in future

As the years go by.”

I’m not really writing this poem…

My words just fall into rhyme

As I look forward to leaving my own footprints

In the sands of time.

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It evidently wasn't out of line, as people who read it quite liked it.