When the unclean spirit in the synagogue cried out to Jesus, "I know You, who You are, the Holy One of God, Jesus rebuked him, saying, Hold your peace." (Mark 1:24) "And unclean spirits, when they saw Him, fell down before Him, and cried, saying, You are the Son of God. And He straitly charge them, that they should not make Him known." (Mark 3:11-12)
He who said, "I receive not testimony from men," (John 5:34) would naturally not receive testimony from devils. The testimony that the Lord desires is the testimony of the life. He says that the honoring of Him with the lips, while the heart is far from Him, is hypocritical and vain. "You hypocrites, well did Isaiah prophesy of you, saying, This people draws nigh unto me with their mouth, and honors me with their lips; but their heart is far from me. But in vain they do worship me, teaching for doctrines the commandments of men." (Matthew 15:7-9) "Why do you call me, Lord, Lord, and do not the things which I say?" (Luke 6:46)
And yet even to this day many religious teachers think to advance the cause of God by quoting testimony from Napoleon and others, whose whole lives where a denial of everything godly. To such the Lord says, "Keep still."
Their patronizing words are only a damage to His cause, in that if unrebuked, they tend to cause men to think that mere words, without deeds, are of some value, or that they are even sufficient to identify one as a Christian.--Present Truth, March 3, 1898--Timeline: IV-5 (The Demoniac in the Synagogue)--Mark 1:24-25.