"An aged Christian, Lying on his deathbed, in a state of such extreme weakness, was asked the cause of his perfect peace. He replied: 'When I am able to think, I think of Jesus; and when I am unable to think of him, I know he is thinking of 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