Here is a little sampling from our reading in Spurgeon:
The field of instruction is wide if men are to be made to know the truth which save. "That the soul be without knowledge, it is not good,' and it is ours as the Lord's instruments to make men so to know the truth that they may believe it, and feel its power. We are not to try and save men in the dark, but in the power of the Holy Ghost we are to seek to turn them from darkness to light.
C. H. Spurgeon, The Soul Winner 
Additional Resources (for Summer Leadership Development)