The Oxford Dictionary of Quotations Preface

Now is come a darker day,
And thou soon must be his prey.
‘Lines written amongst the Euganean Hills’ (1818) l. 115 (on Venice)
The fountains mingle with the river,
And the rivers with the ocean;
The winds of heaven mix for ever
With a sweet emotion;
Nothing in the world is single;
All things, by a law divine,
In one spirit meet and mingle.
Why not I with thine?
‘Love’s Philosophy’
I met Murder on the way—
He had a mask like Castlereagh.
‘The Mask of Anarchy’ (1819) st. 2
His big tears, for he wept full well,
Turned to mill-stones as they fell.
And the little children, who
Round his feet played to and fro,
Thinking every tear a gem,
Had their brains knocked out by them.
‘The Mask of Anarchy’ (1819) st. 4 (on ‘Fraud’ [Lord Eldon])
Nought may endure but Mutability.
‘Mutability’ (1816)
I stood within the City disinterred;
And heard the autumnal leaves like light footfalls
Of spirits passing through the streets; and heard
The Mountain’s slumberous voice at intervals
Thrill through those roofless halls.
‘Ode to Naples’ (1820) l. 1
O wild West Wind, thou breath of Autumn’s being,
Thou, from whose unseen presence the leaves dead
Are driven, like ghosts from an enchanter fleeing,
Yellow, and black, and pale, and hectic red,
Pestilence-stricken multitudes: O thou,
Who chariotest to their dark wintry bed
The wingéd seeds, where they lie cold and low,
Each like a corpse within its grave, until
Thine azure sister of the spring shall blow