We see in these two verses Satan standing at Joshua's right hand in order to resist him as he leads the work to rebuild the Temple. This tells us that Satan is the chief opponent of God’s work, then, and in any age.
There is, therefore, Satanic opposition to the building of the true church today. All perversions of Christianity, and all false religions, are satanic in their origin, and all unbelievers are in a universal allegiance to Satan himself, even though they do not realise it.
The Devil is active right now in opposing men’s reception of Gospel truth. It is only through faith in Christ that his hold over the hearts of men can ever be broken, for at the Cross a way of escape from the Devil’s clutches was opened up.
Gospel preaching, therefore, is part of a cosmic spiritual conflict whereby demonic forces are challenged and overcome. Let us accordingly engage in earnest prayer, for “we wrestle not against flesh and blood, but … the rulers of the darkness of this world, against spiritual wickedness in high places” (Ephesians 6:12).