Saint Porphyrios the Kapsokalyvite of Milesi , Oropos
Prayer should be interior, prayed with the mind and not with the lips, so as not to cause distraction witht he mind wandering here and there. Let us bring Christ into our mind in an unforced manner by repeating very gently, ‘Lord Jesus Christ, have mercy on me.’ don’t think anything except the words, ‘Lord Jesus Christ, have mercy on me.’ Nothing else.
In debates, if you say a few words about religion you will prevail. Let the person who has a different opinion give free reign to his thoughts and speak as much as he likes… Let him sense that he is addressing himself to a calm and uncontentious person. Influence him though your graciousness and prayer and then speak briefly. You achieve nothing if you speak heatedly and tell him, for example, ‘What you are saying is untrue, a downright lie!’ What will you achieve? Be ‘as sheep among wolves’ (Matt 10:16). What should you do? Show indifference outwardly, but be praying inwardly. Be prepared, know what you are talking about and speak boldly and to the point, but with saintliness, meekness and prayer. But in order to be able to do this you must become a saint.
The most important weapon to use against the devil is the Holy Cross, of which he is terrified. … communication with the Christ, when it takes place simply and naturally without force, makes the devil flee.
This is our method. We will raise our ams to Christ and He will give us grace.