“For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies:” —Matthew 15:19
By the heart we usually understand the affections, and doubtless the affections of man are the sources of his crimes. It is because man does not love his Maker with all his heart, and soul, and strength, but loves himself, that he therefore breaks his Maker’s laws to please himself. It is because man does not love that which is right, and good, and true, but because he delights in that which is false and evil, that his actions become defiled….
Come to the cross and ask the Saviour who fought himself with temptation and overcame it, ask him to cleanse you from your past sins in his precious blood; ask him to let his Divine Spirit, who is the great Regenerator, enter into you, and make you a new creature; and when you are a new creature then there shall be the new longings, the new hopes, the new fears, which shall enable you to follow a new course to the glory of God. If your heart be evil, you must get a new heart or you cannot be holy.
—Charles H. Spurgeon (1834-1892)
Metropolitan Tabernacle Pulpit, Vol. 13 Delivered Sunday Morning, January 27, 1867
At the Metropolitan Tabernacle, Newington Sermon No. 732, “The Heart – a Den of Evil”