Lux (Light) is movement three of my first string quartet, Iter Animae (Journey of the Soul).  As a whole, the string quartet depicts a transformation from dark to light.  The final movement, Lux, is intended to be a celebration of life.  The work is full of harmonics, which depict the ethereal nature of light, and is largely based on two simple melodies.  The piece begins with the first and second violins sounding the first melody piecemeal and in canon, then moves through a transitionary phase via the second rising melody.  The second use of the melody is in a darker mode and is followed by a section composed almost entirely of natural harmonics . The climax of the piece features a layering of both melodies - the first melody in the first violin and second in the viola.