“But if you have a faith which never touches your heart, a faith which never causes you to rejoice or mourn, a faith which neither makes you hate sin nor love the Lord Jesus, I charge you shake off your faith as Paul shook the viper from his hand, for it is a deadly faith…. Only the living faith which works upon the heart and influences the desires and the affections can be the faith of God’s elect.”

Charles Spurgeon, Spurgeon’s Sermons Volume 23, (Albany, OR: Ages Software) 1998, on Acts 15:9 .