Excerpts from Impressions, by Martin Wells Knapp, 9

He [Satan] is the author, directly or indirectly, of all "Impressions from below." Many impressions come from him directly. They frequently are shot by him into the mind, like the leaping of lightning from a dark thunder-cloud, and astound by their suddenness and awfulness.

1. Evil Angels. "There are," says a gifted writer on this subject, "the voices of evil and deceiving spirits, who lie in wait to entrap every traveler entering these higher regions of spiritual life. In the same epistle which tells us that we are seated in heavenly places in Christ, we are also told that we shall have to fight with spiritual enemies. These spiritual enemies, whoever or whatever they may
be, must necessarily communicate with us by means of our spiritual faculties and their voices, as the voice of God, is an inward impression made upon our spirit. Therefore, just as the Holy Spirit may tell us by impressions what the will of God is concerning us, so also will these spiritual enemies tell us by impressions what is their will concerning us, though not of course giving it their name." --
From Christian's Secret of a Happy Life.

"I believe," says John Wesley, "that united under Satan, they either range the upper regions, whence they are called princes of the power of the air, or, like him, walk about the earth as 'roaring
lions seeking whom they may devour."' A greater than Wesley has said: "For we wrestle not with flesh and blood, but against principalities, against powers, against the rulers of darkness of this world, against spiritual wickedness [margin, wicked spirits] in high places."

As good angels may be the messengers of impressions from above, so may evil ones, who are ever ready to blight and annoy and perplex and destroy, be of those from below.

Human Influence. Bad people are wires over which evil impressions fly thick and fast. An evil word or glance may make an impression that is lasting.

From Impressions, by Martin Wells Knapp. Original publication date, 1892. Public domain. My source is here. The previous post in the series is here.