"Through lack of knowledge, the majority of even the most spiritual people, do not carry out a full and perpetual war upon this army of wicked spirits; and many are shrinking from the subject, and the call to war against them" Jesse Penne Lewis (War on the Saints)
Jesse Penne Lewis is generally regarded by charismatics as responsible for bringing an end to the Welsh revival of 1904. She was close to Evan Roberts during the revival and also after the breakdown from which he never fully recovered. Yet from reading "War on the saints", it is clear to me that her fight was against an onslaught of deceiving spirits that descended upon the Church at a time when people were unwittingly receptive to any, and all, supernatural forces rather than just the Holy Spirit.
"War on the Saints" describes a "confederacy of satanic spirits" and the conditions which, when fulfilled, they are able to manifest their power.
It is a remarkably "up front" account of Satan's mode of operation and therefore in my opinion, one of the most important books of the last century.
In fact, many of those charismatics who believe that the Holy Spirit causes people to bark like dogs, or roll around under the pews hissing like snakes, should take serious note of it.
Her insights into the working of demonic spirits in human affairs are profound. For example, she identifies how evil spirits are able to disguise themselves as part of a persons personality, or how the use of mediums to predict the future, allows spirits to manipulate the circumstances of a persons life so that the "foretold" event, comes to pass.
One of the primary messages that Jesse Penne Lewis expounds upon, is the issue of "grounds", the legal rights which we give to demonic forces to enter our lives, either in part, or to an extreme degree.
The circumstances whereby we allow "grounds" for demonic activity in our lives are varied. Volitional sin is arguably a primary factor, as is involvement in the occult. Being a good person, or even going to Church, does not offer a reliable safeguard.
It is through knowledge of the working of the true Holy Spirit, which will ALWAYS reaffirm the message of the scriptures, that we can begin to stand against the wiles of Satan.
The means by which we are to resist, and furthermore, to strike back against the enemy are described as the "Armour of God". Truth, righteousness, faith, salvation, and the spreading of the gospel are our defence, and the "Sword of the Spirit", which is the word of God, is our weapon, and mighty it is to cut through the darkness. That is why it is essential that we are familiar with the scriptures.