The Devil Waits For Opportunites

The devil is very skilful in availing himself of particular or especial occasions. He has the sagacity to perceive, that it is of no use to throw arrows at the man whose armor is completely on. He therefore keeps himself at a distance, hides himself as it were, says nothing, does nothing. He is waiting to see the shield displaced or the helmet taken off. And he will be found returning suddenly and powerfully, and, too often effectually, when the favorable opportunity presents itself.

— Religious Maxims (1846) C.