sentences:  Singing is as varied and multi-faceted in its forms as chanting and vestments, it changes with the Church 'seasons' of commemoration thus singing during Great Lent is always somber and during Holy Week nearly becomes a sorrowful dirge while during Pascha (Easter) and the Paschal season the notes are high and quick and as joyful as they were sad during Lent.The power of music is not lost on the Orthodox and it is used to its full effect to bring about spiritual renewal in the listeners.In Russian Orthodox churches bells are often used.