" Pity would be no more
If we did not make somebody Poor;
And Mercy no more could be
If all were as happy as we.

And mutual fear brings peace,
Till the selfish loves increase:
Then Cruelty knits a snare
And spreads his baits with care.

He sits down with holy fears
And waters the ground with tears:
Then Humility takes its root
Underneath his foot.

Soon spreads the dismal shade
Of Mystery over his head,
And the Catterpiller and Fly
Feed on the Mystery.

And it bears the fruit of Deceit,
Ruddy and sweet to eat,
And the Raven his nest has made
In its thickest shade.

The Gods of the earth and sea
Sought thro' Nature to find this Tree,
But their search was all in vain:
There grows one in the Human Brain. "

― William Blake , Songs of Innocence and of Experience