Whedon's Commentary on the Bible - Isaiah 12:2
2. I will… not be afraid The reason given is, The Lord Jehovah is my strength and my song. In the Hebrew it is, Jah Jehovah. The word “Jah” is prefixed to intensify, to denote the extraordinary. It is but a fragment of Jehovah, and, according to Furst, simply serves this office for it. Used again by Isaiah only at Isaiah 26:4. The meaning is, The very great Jehovah is my song. Exodus 6:3. read more
Wesley's Explanatory Notes - Isaiah 12:2
Behold, God is my salvation; I will trust, and not be afraid: for the LORD JEHOVAH is my strength and my song; he also is become my salvation.God — My salvation hath not been brought to pass by man, but by the almighty power of God. read more