Source: https://www.bertha-dudde.org/en/proclamation/2927
2927 Challenges to the adversary and weapons....
October 16, 1943: Book 37
You must never give yourselves over to the forces of evil, for your will determines its power over you. As soon as this will is turned towards God you are immune to his attacks and you will not be so exposed to his temptations. Yet he only lurks for moments when this will is weak in order to gain influence over him. Therefore watch and pray.... never feel so strong that you do not need to fear him, but know that he constantly lurks around you and tries to turn you away from God. For he knows about the weaknesses of the individual and uses them in such a way that the human being is in danger if he does not remain in constant contact with God through heartfelt prayer and loving activity. Where love is practiced, the enemy encounters stiff resistance, for there his efforts are fruitless. Loving activity is the surest way to banish him from the vicinity. God's adversary leaves a person who is active in love unmolested because he is so closely united with God through his activity of love that all power of the adversary is shattered. For love is God, and he can no longer successfully fight against God. The will to do good is likewise a strong weapon against him, only lukewarmness and sluggishness are a great danger, for they signify weakness of will and are welcome opportunities for God's adversary to bring his power to bear. He is immediately prepared to reinforce the weak-willed state by presenting the human being with pleasures which are intended to captivate his senses and turn him away from that which alone is worth striving for.... from union with God.... He seeks to disturb the intimacy of prayer and to gain influence over people's thinking. If he succeeds, man loses himself in superficialities, his spiritual striving weakens and his power to resist diminishes. A person who strives towards God will indeed fight his way through again, but it is lost time which is irreplaceable, for every ascent is arduous and therefore all the more difficult the deeper the person sinks. Therefore watch and pray, do not let up in your striving towards God, call upon Him for His help and thus deny the adversary access to you. Remain active in love and thereby resist his efforts, then you will always have the strength to fend him off and withdraw yourselves from his influence....
amen
Translated by Doris Boekers