O thou summer's harmony,
I have lived and mourned for thee;
Each day I mourn along the wood,
And night hath heard my sorrows loud.

In his other mood—the mood of elemental force—Blake produces effects which are unique in literature. His mastery of the mysterious suggestions which lie concealed in words is complete.

He who torments the Chafer's Sprite
Weaves a Bower in endless Night.

What dark and terrible visions the last line calls up! And, with the aid of this control over the secret springs of language, he is able to produce in poetry those vast and vague effects of gloom, of foreboding, and of terror, which seem to be proper to music alone. Sometimes his words are heavy with the doubtful horror of an approaching thunderstorm:

The Guests are scattered thro' the land,
For the Eye altering alters all;
The Senses roll themselves in fear,
And the flat Earth becomes a Ball;
The Stars, Sun, Moon, all shrink away,
A desart vast without a bound,
And nothing left to eat or drink,
And a dark desart all around.

And sometimes Blake invests his verses with a sense of nameless and infinite ruin, such as one feels when the drum and the violin mysteriously come together, in one of Beethoven's Symphonies, to predict the annihilation of worlds:

On the shadows of the Moon,
Climbing through Night's highest noon:
In Time's Ocean falling, drowned:
In Aged Ignorance profound,
Holy and cold, I clipp'd the Wings
Of all Sublunary Things:
But when once I did descry
The Immortal Man that cannot Die,
Thro' evening shades I haste away
To close the Labours of my Day.
The Door of Death I open found,
And the Worm Weaving in the Ground;
Thou'rt my Mother, from the Womb;
Wife, Sister, Daughter, to the Tomb:
Weaving to Dreams the Sexual strife,
And weeping over the Web of Life.

Such music is not to be lightly mouthed by mortals; for us, in our weakness, a few strains of it, now and then, amid the murmur of ordinary converse, are enough. For Blake's words will always be strangers on this earth; they could only fall with familiarity from the lips of his own Gods:

above Time's troubled fountains,
On the great Atlantic Mountains,
In my Golden House on high.

They belong to the language of Los and Rahab and Enitharmon; and their mystery is revealed for ever in the land of the Sunflower's desire.