"Polycarp, being required by an infidel to blaspheme Christ, made him this witty and devout answer: 'Eighty-six years have I lived, neither did he once harm me in any one thing; why then should I blaspheme my God, which neither hindered me nor injured me?'" 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