One of my favorites from Robert Frost which I recently rediscovered again.

The Road Not Taken

Two roads diverged in a yellow wood,
And sorry I could not travel both

And be one traveler, long I stood
And looking down one as far as I could

To where it bent in the undergrowth;
Then took the other, as just as fair,

And having perhaps the better claim,
Because it was grassy and wanted wear;

Though as for that, the passing there
Had worn them really about the same,

And both that morning equally lay
In leaves no step had trodden black.

Oh, I kept the first for another day!
Yet knowing how way leads on to way,

I doubted if I should ever come back.
I shall be telling this with a sigh

Somewhere ages and ages hence;
Two roads diverged in a wood, and I

I took the one less traveled by,
And that has made all the difference.