Divine Investiture of Authority, properly applied

Spencer W. Kimball taught that:

"The priesthood is the power and authority of God delegated to man on earth to act in all things pertaining to the salvation of men. It is the means whereby the Lord acts through men to save souls. Without this priesthood power, men are lost."

Jesus Christ holds the Melchizedek Priesthood:

Hebrew 5:8-10

Though he were a Son, yet learned he obedience by the things which he suffered;
And being made perfect, he became the author of eternal salvation unto all them that obey him;
Called of God an high priest after the order of Melchisedec.

The Divine Investiture of Authority is the same thing as the Priesthood: God has given his authority to an individual (or group of individuals) to act in His behalf on the earth. It is evoked any time a priesthood blessing is given, and any time a sermon is preached by the Spirit. However, it does not give one avatar status as God: You retain your own identity.

Jesus was invested with authority to act in God's behalf, healing people, cast out devils, performing all sorts of miracles.

Difference between the Priesthood Authority which Jesus wielded and that that we ourselves may exercise? He had become perfect (perhaps in a previous probation,) and we have yet to do so.