It is common occult practice to say a mantra (repeating a phrase or phrases) that alters the state of mind of the speaker. Jesus warns of "vain repetitions" in prayer (heaping up empty phrases is the ESV wording).
Is there a link between some of our "worship" songs and these empty phrases?
If your mind is easily engaged in the song and your heart leaps for joy at our amazing God's glory and in thanks at the knowledge of His blessings; you are on safe ground and the Spirit is there.
If you have a hard time remembering what the song was about, and this is a regular thing, you are in the danger zone.