The Magic of Faith (Unabridged‪)‬

You sing the Song of God, or the mood of triumph, when you subjectively feel that you are that which your five senses tell you that you are not; you are then God-intoxicated and seized with a divine frenzy - a sort of mad joy.

Haven't you at times seen a person bubbling over with enthusiasm and intoxicated with joy? That person is singing the song of God at that moment.

"In thy presence is fullness of joy; at thy right hand there are pleasures for evermore."