[Jesus] did all His miracles by the power of this personal union. He showed His divine majesty, according to His pleasure, when and as He willed. He did this not just after His resurrection and ascension, but also in His state of humiliation. For example:
(a) At the wedding at Cana of Galilee
(b) When He was twelve years old, among the learned
(c) In the garden, when with a word He cast His enemies to the ground
(d) In death, when He died not simply as any other man, but in and with His death conquered sin, death, devil, hell, and eternal damnation
The human nature alone would not have been able to do these miracles if it had not been personally united and had communion with the divine nature.
The human nature, after the resurrection, is exalted above all creatures in heaven and on earth. This is nothing other than that He entirely laid aside the form of a servant. He has the full possession and use of the divine majesty according to His received human nature. However, He had this majesty immediately at His conception, even in His mother's womb. As the apostle testifies, He laid it aside. Luther explains, He kept it concealed in the state of His humiliation and did not always use it, but only when He wanted to use it. (pars 25-26)
Condensed from CONCORDIA: THE LUTHERAN CONFESSIONS, copyright 2005,2006 by Concordia Publishing House. Used by permission. All rights reserved. To purchase a copy of CONCORDIA, call 800-325-3040.