I have very good friends while they are charismatic, which is praising God and receiving gifts of the Holy Spirit, they are VERY ORTHODOXY. They go to Adoration of the Blessed Sacrament, confession regularly, very disciplined Christians and good Catholics striving for Holiness with the help of our Lord. Some people in these groups just learn about the Holy Spirit and pray, then there are some who are different. I went to a healing service which was praying over people by a healer, people would come up front with a line going across the front of the church and then each would be prayed over. Now when I watched people going down on the floor it was like whoa, slain in the spirit they called it! Then my husband and his friend and myself went up front to be prayed over I kept my eye on the Nun near me and my husband next to me. All these people were going down but I was skeptical and was afraid this was not of God. Everyone in the line went down but me! When she prayed over me I felt a tremendous sensation but I would not let myself go down to the floor, I was discerning. My friend at the time was going blind and that is why we went to the healing service. Neither one of us went down, she got freaked and never went up to be prayed over which is why we were there. So she talked me into going the next night. I prayed before going up there and told the Lord if this is not from you I am not going down so it is up to you. My friend and I were the first to go up and she prayed over me first, I had my feet planted saying it’s up to you Lord, bam next thing I know I was looking up off the floor. It’s hard to explain the feeling because we have to be careful with our emotions that we can allow ourselves to get caught up with but it was a sense of calm, excitement and energy afterward. I do believe in the power of the Holy Spirit especially in the action of the Mass giving us the Holy Eucharist. I cannot speak for others that is not my place but I stay constant in striving for trusting in Jesus for all things.
St. John of the Cross had the crucified Christ appear to him many times, and also many times it was the devil. It got so difficult for him to distinguish which was which, that he asked Our Lord not to appear to him anymore, as he could not distinguish the difference, and he did not need to see the Lord to believe (he did not need signs and wonders, to believe).