In the Old Testament, Isaiah said that God did not want sacrifices and offerings. (Isa 1:11-15)

In the Old Testament, Hosea said that God did not want sacrifices, but rather the knowledge of God rather than the burnt offerings. (Ho 6:6)

Ho 6:6 For I desired mercy, and not sacrifice; and the knowledge of God more than burnt offerings.

God wants obedience to God's word rather than sacrifice. (1 Samuel 15:22)

1 Samuel 15:22 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.

Jesus sanctified us by offering his body once for all to fulfill God's will to save us. (Hebrews 10:4-10)

Hebrews 10:4 For it is not possible that the blood of bulls and of goats should take away sins. 5 Wherefore when he cometh into the world, he saith, Sacrifice and offering thou wouldest not, but a body hast thou prepared me: 6 In burnt offerings and sacrifices for sin thou hast had no pleasure. 7 Then said I, Lo, I come (in the volume of the book it is written of me,) to do thy will, O God. 8 Above when he said, Sacrifice and offering and burnt offerings and offering for sin thou wouldest not, neither hadst pleasure therein; which are offered by the law; 9 Then said he, Lo, I come to do thy will, O God. He taketh away the first, that he may establish the second. 10 By the which will we are sanctified through the offering of the body of Jesus Christ once for all.

Eternal life is to believe in God and in Jesus Christ, whom God has sent. (John 17:3)

John 17:3 And this is life eternal, that they might know thee the only true God, and Jesus Christ, whom thou hast sent.

Only through Jesus can we know the will of God and meet God. (John 14:6)

John 14:6 Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.

Jesus said that God did not want sacrifices, but that people should believe in the One whom God sent, Christ. (Matthew 9:13)

Matthew 9:13 But go ye and learn what that meaneth, I will have mercy, and not sacrifice: for I am not come to call the righteous, but sinners to repentance.

To obey God's Word is to believe in Jesus as the Christ. As a proof, God has given the Holy Spirit to those who believe in Jesus as the Christ. (Acts 5:30-32)

Acts 5:30 The God of our fathers raised up Jesus, whom ye slew and hanged on a tree. 31 Him hath God exalted with his right hand to be a Prince and a Saviour, for to give repentance to Israel, and forgiveness of sins. 32 And we are his witnesses of these things; and so is also the Holy Ghost, whom God hath given to them that obey him.