Four Seasons fill the measure of the year;
There are four seasons in the mind of man:
He has his lusty Spring, when fancy clear
Takes in all beauty with an easy span:
He has his Summer, when luxuriously
Spring’s honied cud of youthful thought he loves
 
To ruminate, and by such dreaming high
Is nearest unto heaven: quiet coves
His soul has [...]

If by dull rhymes our English must be chain’d,
And, like Andromeda, the Sonnet sweet
Fetter’d, in spite of pained loveliness,
Let us find, if we must be constrain’d,
Sandals more interwoven and complete
To fit the naked foot of Poesy:
Let us inspect the Lyre, and weigh the stress
Of every chord, and see what may be gain’d
By ear industrious, and [...]

 
When I have fears that I may cease to be
Before my pen has glean’d my teeming brain,
Before high-pilèd books, in charac’try,
Hold like full garners the full-ripen’d grain;
When I behold, upon the night’s starr’d face,
Huge cloudy symbols of a high romance,
And feel that I may never live to trace
Their shadows, with the magic hand of chance;
And [...]

This famous sonnet was written by Keats in Joseph Severn’s copy of The Poetical Works of William Shakespeare opposite the poem ‘A Lover’s Complaint’.
Bright star! would I were steadfast as thou art—
Not in lone splendour hung aloft the night,
And watching, with eternal lids apart,
Like Nature’s patient sleepless Eremite,
The moving waters at their priestlike [...]