from Alexander Pope's "An Essay on Man,"

of which...

Placed on this isthmus of a middle state,

A being darkly wise and rudely great:

With too much knowledge for the Sceptic side,

With too much weakness for the Stoic's pride,

He hangs between, in doubt to act or rest;

In doubt to deem himself a God or Beast;

In doubt his mind or body to prefer;

Born but to die, and reas'ning but to err;

Alike in ignorance, his reason such,

Whether he thinks too little or too much;

Chaos of thought and passion, all confused;

Still by himself abused or disabused;

Created half to rise, and half to fall:

Great lord of all things, yet a prey to all;

Sole judge of truth, in endless error hurl'd;

The glory, jest, and riddle of the world!