To what purpose is the multitude of your sacrifices unto me? saith the LORD: I am full of the burnt offerings of rams, and the fat of fed beasts; and I delight not in the blood of bullocks, or of lambs, or of he goats.

And Samuel said, Hath the Lord as great delight in burnt offerings and sacrifices, as in obeying the voice of the Lord? Behold, to obey is better than sacrifice, and to hearken than the fat of rams.

And ye shall offer up unto me no more the shedding of blood; yea, your sacrifices and your burnt offerings shall be done away, for I will accept none of your sacrifices and your burnt offerings
And ye shall offer for a sacrifice unto me a broken heart and a contrite spirit.

COMMENTARY

To what purpose is the multitude of your sacrifices unto me? I delight not in the blood of bullocks
Behold, to obey is better than sacrifice, and to hearken than the fat of rams
And ye shall offer up unto me no more the shedding of blood. And ye shall offer for a sacrifice unto me a broken heart and a contrite spirit.
Sacrifice is important. When we are laden with sins the only proper action is to sacrifice them, to give them up forever. When we have vain desires and idle habits, these too need to be sacrificed. Sacrifice is how we remove all of our distractions to make way for the work of God.
But after we have done this we come to a higher form of offering, one that evidently gives God even greater pleasure than sacrifice. This is consecration, the act of spending our hearts, spirits, and actions in the service of God.
Sacrifice is, necessarily, a dead offering. By this process something is destroyed or made inactive, something worldly that has kept us from being in alignment with God. Consecration, on the other hand, is a living offering. By it we create something or perform some action, something that is in harmony with God.