D&C 132

To be honest, I have always struggled to understand the conditions of God's law with the words -

"...and that too most holy..."  (Doctrine and Covenants | Section 132:7)

...included with the Holy Spirit of promise and priesthood authority.  The meaning seemed to dawn on me this morning when the Lord asked -

"...Will I accept of an offering, saith the Lord, that is not made in my name?
10 Or will I receive at your hands that which I have not appointed?"  (Doctrine and Covenants | Section 132:9 - 10)

The Lord then proceeds to review the conditions of His laws over and over with

"...but by me or by my word, which is my law, saith the Lord."  (Doctrine and Covenants | Section 132:12)

In other words, in my mind, "that too most holy" is in reference to that it must be done by Him or by His word, which I His law.