If we are called to be observers and contemplators, we are also called to nourish, to be nourishers, not consumers. Only a nourisher knows when to stop, not to overeat, overindulge, to draw back. To say no. I have a friend who has a coffee mug with the inscription: DON'T JUST DO SOMETHING, STAND THERE ... We often underestimate those who stand there. But I have had to do some new thinking about all this, as I have had to do some new thinking about the sound of the tree falling in the forest. If we are unwilling to practice the gift of contemplation, we are likely to get stuck in one position, and to be fearful of changing it, and so we cling, unable to laugh at ourselves and move on.
To listen to music or to sing a chant is to do something that has no practical purpose; it is just celebration and praise; it is just tasting the joy and beauty of life, the glory of God. Listening to it, even in the midst of a very purposeful day, reminds us to add the other dimension to our experience, the dimension of meaning, that makes it all worthwhile.