1- prove from the Bible that the death is a sacrifice.
2 Samuel 12:3-7 But the poor man had nothing, save one little ewe lamb, which he had bought and nourished up: and it grew up together with him, and with his children; it did eat of his own meat, and drank of his own cup, and lay in his bosom, and was unto him as a daughter. And there came a traveller unto the
rich man, and he spared to take of his own flock and of his own herd, to dress for the wayfaring man that was come unto him; but
took the poor man’s lamb, and dressed it for the man that was come to him. And David’s anger was greatly kindled against the man; and he said to Nathan, As the LORD liveth, the man that hath done this thing shall surely die:
And he shall restore the lamb fourfold, because he did this thing, and because he had no pity. And Nathan said to David,
Thou art the man. Thus saith the LORD God of Israel, I anointed thee king over Israel, and I delivered thee out of the hand of Saul;
2 Samuel 12:13-15 And David said unto Nathan, I have sinned against the LORD. And Nathan said unto David, The LORD also hath put away thy sin;
thou shalt not die. Howbeit, because by this deed thou hast given great occasion to the enemies of the LORD to blaspheme, the child also that is born unto thee shall surely die.
1 Corinthians 15:42-45
So also is the resurrection of the dead. It is sown in corruption; it is raised in incorruption: It is sown in dishonor; it is raised in glory: it is sown in weakness; it is raised in power: It is sown a natural body; it is raised a spiritual body. There is a natural body, and there is a spiritual body. And so it is written, The first man Adam was made a living soul; the last Adam was made a quickening spirit.
John 1:29 The next day John seeth Jesus coming unto him, and saith,
Behold the Lamb of God, which taketh away the sin of the world.
It all makes sense together, for me.