Gerhard and Walther

Cocky self-assurance is a spiritual anesthesia to anyone who lets it come in and overcome his soul.—Johann Gerhard, Schola Pietatis III:84

If, then, a person is to be filled with the Holy Ghost so he can be saved, the Law of God must first sound through his heart like a rushing wind coming down from heaven, awakening him from his spiritual sleep.—C. F. W. Walther, God Grant It!, p. 435,6.