Read: 1 John 4:1-6 and Psalm 119:161-168
St. John urges us to have discernment. There are people going around who are not true believers but who would trick us into thinking they are. We have to be discerning about what they say. Are the things they teach really of God, or are they just fluff?
Ask God to help you be discerning. Write your own prayer.