Service is one of the two main levers of evolution: one is meditation, the other is service. Service, of whatever kind, gradually distances you from yourself. As your service grows, expands outwards from yourself, you do not lose touch with yourself but you become less and less concerned with your own ego, your personality expression. Service is the impulse of the soul, the carying out of soul purpose.
A legend told by the Venerable Bede says that the poet Caedmon was once completely mute. It was a custom in his village to spend evenings taking turns reciting poetry. On these occasions, Caedmon, unable to speak, would steal away to nearby hills to escape. One evening while walking alone, an angel appeared and urged him to sing. Miraculously, he began to sing and went on the become a famous poet.