Today Christians lack two kinds of knowledge. Because of this lack, they fall into endless misery that they cannot recover from. These two kinds of knowledge are: (1) the condition for evil spirits to work, and (2) the principle of spiritual life. Because of ignorance, Satan and his evil spirits are given the greatest advantage, and the church of God experiences the greatest suffering. “My people are destroyed / Because of a lack of that knowledge” (Hosea 4:6). This is truly a word written for today’s believers. Much of what man regards as knowledge is merely his ideas. Hence, they are of no use. Apart from this knowledge, godly knowledge is indispensable to the believers. The absence of godly knowledge will result in grave damage. It is sad that in a time of widespread ignorance as today, believers still do not humble themselves before God and seek after the truth that God would reveal. They are still proud and boastful of their familiarity with the Scriptures and the abundance of their experiences. On the one hand, they fall into danger and do not know how to turn back; they fall into a hopeless situation and have no idea of the need for deliverance. On the other hand, they boast of the richness of their knowledge. How pitiful this is!