Just a little encouragement in your evangelistic zeal from the Prince of Preachers.
What earnestness our theme deserves! We have to tell of an earnest Saviour, an earnest heaven, and an earnest hell. How earnest we ought to be when we remember that in our work we have to deal with souls that are immortal, with sin that is eternal in its effects, with pardon that is infinite, and with terrors and joys that are to last for ever and ever! A man who is not in earnest when he has such a theme as this,—can he possess a heart at all?
On preaching in light of this principle, Spurgeon has the following to say:
That is what you must do with your sermons, make them red-hot; never mind if men do say you are too enthusiastic, or even too fanatical, give them red-hot shot, there is nothing else half as good for the purpose you have in view. We do not go out snow-balling on Sundays, we go fire-balling; we ought to hurl grenades into the enemy's ranks.
The "red-hot shot" this preacher hurled on Sundays has survived to this day and is still being used by God to sink ships of unbelief.