How much, preventing God! how much I owe
To the defenses thou hast round me set:
Example, custom, fear, occasional slow,
These scorned bondmen were my parapet.
I dare not peep over this parapet
To gauge with glance the roaring gulf beelow,
The depths of sin to which I had descended,
Had not these me against myself defended.
Ralph Waldo Emerson
http://www.poemhunter.com/poem/grace/
