'the ancient doctrines spoke consistently of harmonics, the relationship between tones. pythagoras' key to geometry, astronomy, ethics, and music was the ratio of numbers. in his timaeus plato taught that tone and musical intervals created nothing less that the world soul. iamblichus noted that 'pythagorus considered that music contributed greatly to health if used in the right way...he called his method musical medicine. in the spring he applied himself to the following melodic method: he would sit in the middle of his disciples who were able to sing melodies, and play his lyre. to the accompaniment of pythagorus' lyre, his followers wold sing in unison certain chants or paens (usually to apollo who was also paian or the healer) by which they appeared to be delighted and became melodious and rhythmical. at other times his disciples also employed music as medicine, with certain melodies composed to cure the passions of the psyche, as well as ones for despondency and mental anguish. in addition to these medical aids there were other melodies for anger and agression and for all psychic disturbances.' de vita pythagorica ed deubner, leipzig 1937
now, as i see it - as a christian - i feel similarly in church. when i am singing words (vs only instrumental) it is 100% more effective to feel rejuvinated in worshipping God. if anyone wonders, like me, why they feel differently when coming out of a worship service (after performing or singing music to God) - it is probably because they are beginning to understand what the Spirit does. there are good spirits and evil spirits. saul was ridded of evil spirits when david played his harp. that is because the element of david's spirit or character came out when he played his music. now, imo, in a congregation - you have a multitude of people there with a similar heart and spirit - and the effect is mind-boggling. it is as if time and space are interluded with spirit and timelessness. also, the feeling that God actually heard the music and was pleased to interact by inspiring the performers. jsut as people can be inspired when speaking - i think performers can be inspired when playing. the effect is for the purpose of calming souls. the anxiety of the world becomes overwhelming at times. God must have known we needed a day of rest. to recharge and become familiar again with the spirit world. the one where we rest in God's strength and glory. it's not a music to see who plays the best - but one where everyone partakes of the 'meal' of praise. it is like eating a good meal. the players the listeners- everyone is doing something. the common goal makes it different than a seance or anything like that (which i would not suggest, btw, and have never desired to) - it is reaching out towards God and asking Him to come into our reality and be a part of our worship of Him.