These words from Charles Spurgeon were originally preached to Christian parents of unbelieving children and to wives of unbelieving spouses. The quote is from his sermon on Jeremiah 4:20 (sermon #349) delivered on 9 Dec 1860:
Oh my brothers and sisters in Christ, if sinners will be damned, at least let them leap to hell over our bodies and if they will perish, let them perish with our arms about their knees, imploring them to stay, and not madly to destroy themselves. If hell must be filled, at least let it be filled in the teeth of our exertions, and let not one go there unwarned and unprayed for.
Tony Reinke 
It seems a lot of blogs are defending the doctrine of hell due to the Rob Bell book coming out.
This Spurgeon quote made me realize that it is the doctrine of hell which engenders in a Christian the compassion that we should have toward the lost. Why should we have compassion, and concern ourselves with the conversion of lost souls if there is no judgement, damnation, or hell? What really would be at stake? What would be the cause for our compassion?
Great quote!
I have read more than a thousand sermons by Spurgeon over the last couple of years, and it is easy to see, when you read him, why he considered himself an evangelist – first and foremost.
Thanks for that quote.