Albert Barnes' Notes on the Whole Bible - Isaiah 12:3
Therefore - In view of all his mercies, the Hebrew is, however; simply, ‘” and” ye shall draw.’ It has already been intimated that the Jews applied this passage to the Holy Spirit: and that probably on this they based their custom of drawing water from the fountain of Siloam at the feast of the dedication (note, John 7:37). The fountain of Siloam was in the eastern part of the city, and the water was borne from that fountain in a golden cup, and was poured, with every expression of rejoicing,... read more
The Pulpit Commentary - Isaiah 12:6
Cry out and shout, thou inhabitant of Zion ; i.e. raise a "cry" that may be heard far and wide—a cry that shall be a "shout" of rejoicing. The wool translated "inhabitant" is feminine, and designates the entire community or Church that dwells on the holy hill. For great is the Holy One of Israel in the midst of thee . The crowning glory of the Church is the presence of her Lord in the midst of her a presence continuous ("I am with you always"), efficacious ( John 15:4-6 ), yet... read more