"The devil does not like field preaching. Neither do I. I love a commodious room, a soft cushion, a handsome pulpit; but where is my zeal if I do not trample all these under foot in order to save one more soul? "- John Wesley, as quoted in Spurgeon's Sermon Notes
Further recommended reading & listening:
The Best of The Daily Spurgeon
The Forgotten Spurgeon, by Iain Murray
A Defense of Calvinism - by Charles Spurgeon