Some artists go a whole career without really meaning it.
Look at this performance of Van Morrison's 'Into The Mystic' by Glen Hansard and Marketa Iglova.
It's good, right from the beginning. But just wait till you get to 1min 30; they come ALIVE! And the rest of the performance is transcendent. You're watching two people caught up in LIFE, and their love, and their craft, and the audience. It's everything! And look at the moment on 2mins 22seconds, don't you just love that!
Just look at the concentration. Look at the little tiny almost imperceptible shifts in their faces, in their voices. Feel the chill when they sing together from 1min 6secs. They're SO in the moment. I love music.