Paradise Lost. Book ii. Line 555.

Vain wisdom all and false philosophy.

Paradise Lost. Book ii. Line 565.

Arm th' obdur'd breast

With stubborn patience as with triple steel.

Paradise Lost. Book ii. Line 568.

A gulf profound as that Serbonian bog

Betwixt Damiata and Mount Casius old,

Where armies whole have sunk: the parching air

Burns frore, and cold performs th' effect of fire.