You are absolutely right. The problem is the devil can invoke the same feelings. Since it's impossible to discern the source of the feelings, it's better to ignore them. The feelings may serve as a distraction. Saint John of the Cross 500 years ago went into detail about this in his writings.
I've got to disagree. Consider Matthew 16:13-17:
"When Jesus came into the coasts of Caesarea Philippi, he asked his disciples, saying, Whom do men say that I the Son of man am? And they said, Some say that thou art John the Baptist: some, Elias; and others, Jeremias, or one of the prophets. He saith unto them, But whom say ye that I am? And Simon Peter answered and said, Thou art the Christ, the Son of the living God. And Jesus answered and said unto him, Blessed art thou, Simon Barjona: for flesh and blood hath not revealed it unto thee, but my Father which is in heaven."
Of all the Apostles, Peter alone gave Christ the answer He was looking for -- "Thou art the Christ, the Son of the living God." Jesus responded to Peter's answer by pointing out that Peter was blessed to know this, not because he had been convinced by any other human being, but because God had revealed it to him. And how would God have done this? Wouldn't you agree that it would have been through the power of the Holy Ghost/Holy Spirit? I'm not saying that communication from the Holy Ghost must be accompanied by "a burning in the bosom," but the Holy Ghost
does speak to the heart in addition to the mind. If a person is truly desirous of knowing the truth of spiritual things, I believe that God will respond to his sincere prayers for wisdom. The devil certainly has power to masquerade as something that he is not, but God's power is greater. If you
don't believe you should trust what the Holy Ghost tells you, do you believe there is a better way to decide what's true and what's not? And if you
do believe you should trust what the Holy Ghost tells you, how do you personally recognize that He has spoken to you?