How did Beethoven use program music in Symphony No. 60?

The symphony was the first example of a major composer using voices in a symphony (thus making it a choral symphony). The words are sung during the final (4th) movement of the symphony by four vocal soloists and a chorus. They were taken from the "Ode to Joy", a poem written by Friedrich Schiller in 1785 and revised in 1803, with text additions made by Beethoven.