Though a world of increasing deafness shattered Beethoven's dreams of success in the outer world of society, it also caused him to turn within. And while human relationships came and went, Beethoven was discovering God, the eternal companion. This reorientation of his soul may well be the primary reason for the higher level of composition in his second period creations ... stemming from a fundamental need to express through music new and deeper worlds of soul-experience. Whereas before he composed for himself, in his second period, Beethoven was consciously striving to become the musical servant of God.
~ from BEETHOVEN AND THE SPIRITUAL PATH by David Tame