Speaking in Tongues is waging warfare against the devil. “For this purpose, the Son of God was manifested, that he might destroy the works of the devil” (1 John 3:8). Given this scripture, one could make the argument that The Lord’s priority in the earth is to rid it of the works of the devil. I am cognizant of Luke 4:18, Luke, 19:10 and His much teaching about the Kingdom of God as well; but still!
In the following scriptural passage, The Lord plainly, makes it clear that we will do battle with an invisible foe who is not to be mistaken for a flesh and blood person. He makes it clear that the warfare will be completed by the Power and Might of God. He tells us what the attire is to be, advises as to our most important defensive weapon and equips us with the most lethal offensive weapon in the Universe. Assuredly, He has our backs.
“Finally, my brethren, be strong in the Lord, and in the power of his might. Put on the whole Armour of God, that ye may be able to stand against the wiles of the devil. For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places. Wherefore take unto you the whole Armour of God, that ye may be able to withstand in the evil day, and having done all, to stand. Stand therefore, having your loins girt about with truth, and having on the breastplate of righteousness; And your feet shod with the preparation of the gospel of peace; Above all, taking the shield of faith, wherewith ye shall be able to quench all the fiery darts of the wicked” (Ephesians 6:10-16).
“And take the helmet of salvation, and the sword of the Spirit, which is the word of God: Praying always with all prayer and supplication in the Spirit, and watching thereunto with all perseverance and supplication for all saints: And for me, that utterance may be given unto me, that I may open my mouth boldly, to make known the mystery of the gospel, For which I am an ambassador in bonds: that therein I may speak boldly, as I ought to speak” (Ephesians 6:17-20). “The sword of the Spirit which is the word of God.” The word, “word” here is translated from the Greek word Rhema. The Sword of the Spirit is Supernatural UTTERANCE (a Manifestation of the Holy Spirit). The word “mouth” here is translated from the Greek word “stoma” which means the edge of a sword. Believers should be sure to equip themselves with this most effective offensive weapon; “Praying always and with all prayer and supplication in the Spirit.” This is Praying in Tongues. This is violently (aggressively) laying hold to the Kingdom of Heaven (Matthew 11:12).
I assure you that the devil hates it when saints pray in tongues.