My heart leaps up when I behold

Last January on a bright showery day a magnificent rainbow arched around the village across the northern sky.  The best ever, it seemed at the time.  Initially bright in the west over Broughton Gifford, that intensity soon transferred to Bowden Hill in the east, and then, all to swiftly, sadly, it was all gone.

My heart leaps up when I behold
A rainbow in the sky:
So was it when my life began,
So is it now I am a man,
So be it when I shall grow old
Or let me die!
The child is father of the man:
And I could wish my days to be
Bound each to each by natural piety.

Wordsworth wrote this on March 26, 1802.  The day after, he began to write his longer and better known Ode: Intimations of Immortality.