When mankind doth strive

With its oppressors in a strife of blood

Or when free thoughts, like lightnings, are alive.

And in each bosom of the multitude

Justice and truth with custom's hydra brood

Wage silent war; when priests and kings dissemble

In smiles or frowns their fierce disquietude;

When round pure hearts a host of hopes assemble;

The snake and eagle meet—the world's foundations tremble!

(Shelley — The Revolt of Islam)