"Life work" means that to which one will devote one's energies. It is the world of the soul, as well as the material work done in the visible world. These categories of tasks are not separate: they are not inimical to one another any more than sweeping the temple, washing the vestments, or cleaning and arranging the altar are inimical to the act of prayer. On the contrary, these tasks are prayer. They are the work of the soul in that they provide a suitable atmosphere for the cultivation of a contemplative and receptive attitude.
~ from SEEING THROUGH THE VISIBLE WORLD by June Singer
For some birds, songs are learned by listening to their parents and neighbors during
the first year. For other birds, songs are hardwired -- the music is scored in their
brains from the beginning. For mockingbirds, singing is a lifetime of choir practice
and talent shows, picking up new tunes and modifying old ones.