'How may a young man know whether he is called or not? That is a weighty enquiry, and I desire to treat it most solemnly. O for divine guidance in so doing! That hundreds have missed their way, and stumbled against a pulpit is sorrowfully evident from the fruitless ministries and decaying churches which surround us. It is a fearful calamity to a man to miss his calling, and to the church upon whom he imposes himself, his mistake involves an affliction of the most grievous kind.'
- Charles Spurgeon, Lectures to My Students, page 28