"Inquirers should be answered. It is never well to be dumb to attentive ears. As someone has wisely said, 'We shall have to give an account of idle silence, as well as idle speech.'" - 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