I know spiritual warfare can be fierce at times and it's a consoling thought to know that everyone goes through them and we are not alone in our battles. I believe they build virtue, make us stronger and teach us to rely on God alone. Padre Pio fought many such battles; he could see the demonic world. Here are a few thoughts on this subject from St Pio:
"The field of battle between God and satan is the human soul. It is for the soul that the battle rages every moment of life. The soul must give free access to the Lord so that it can be fortified by Him in every respect and with all kinds of weapons; that His light may enlighten it to combat the darkness of error; that it be clothed with Jesus Christ, with His justice, truth, the shield of faith, the word of God, in order to conquer such powerful enemies. To be clothed with Jesus Christ it is necessary to die to oneself."
"Temptations, discouragement, and unrest are the wares offered by the enemy. Remember this: if the devil makes noise it is a sign that he is still outside and not yet within. That which must terrify us is his peace and concord with the human soul."
"Do not fear. Jesus is more powerful than all Hell. At the invocation of His Name every knee in heaven, on earth and in hell must bend before Jesus. This is the consolation of the good and terror of the evil ones."
No wonder St. Pio is a favorite of mine.