Richard,
Here's a great essay on assurance from Bonar's The Everlasting Righteousness:
Trinity Foundation: Explaining God, man, Bible, salvation, philosophy, theology.
The last few sentences are priceless.
Hope it helps!

__________________
Jim
Elder, Harvest Reformed Church (RCUS)
http://www.harvestreformedchurch.org/
http://tbftgoggi.wordpress.com/

Upon a life I did not live; upon a death I did not die, Another's death, Another's life, I'd rest my soul eternally
Omnia dicta fortiora,si dicta Latina
Si vis pacem, para bellum