Whoever sheds human blood, by humans shall their blood be shed

Genesis 8:20-9:7
Then Noah built an altar to the Lord and, taking some of all the clean animals and clean birds, he sacrificed burnt offerings on it. The Lord smelled the pleasing aroma and said in his heart: “Never again will I curse the ground because of humans, even though every inclination of the human heart is evil from childhood. And never again will I destroy all living creatures, as I have done.
Then God blessed Noah and his sons, saying to them, “Be fruitful and increase in number and fill the earth. 
Everything that lives and moves about will be food for you. Just as I gave you the green plants, I now give you everything. But you must not eat meat that has its lifeblood still in it. And for your lifeblood I will surely demand an accounting.
Whoever sheds human blood, by humans shall their blood be shed; for in the image of God has God made mankind.
Sadly, even a completely fresh start does not restore Eden or change human nature. Though the 'image of God' remains, so too does the dysfunction in creation. Animals are now food for humans. 
Why?
Noah is honor the name of the Lord and he knew his life is saved by the Lord, so he built an altar to the Lord. so give thanks to the Lord is our role.
God blesses all creatures in the world, and never destroy all living creatures. But asked us must not eat meat that has its lifeblood still in it. For blood means their life which is created by the Lord. \
Human beings have an image of God so we have to respect each other, whoever sheds human blood, shall their blood be shed. This is the righteousness either.
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1.新世代的開始，人用敬拜來讚美神
   亞當是從安息開始，被造之日後安息日開始新生命。也就是什麼事都不用做。
   挪亞的新生活從奉獻開始，敬拜開始。燔祭燒掉表示完全的奉獻，剝皮：裏外一致，沒有遮掩，切塊： 沒有原來的樣子。以這樣的心獻給神。神喜悅並且賜福給挪亞一家。一個禮拜的開始從敬拜開始。一天早上開始讀經，即一天由敬拜神開始奉獻開始，即我們一直在主裏面。不是離開神一下，透一口氣，這是危險的。
2.新世代神用新的約定與人立約。神因為挪亞的緣故，不再毀滅人。全然接納我們。恢復秩序，恢復原來的創造，惟出現了冬夏、寒暑，創世時沒有很大的溫差，無須穿衣服保暖。這就是新世代的秩序。新的秩序即尊重生命。不可吃活生生的肉。這是動物不是人的行為。不帶著血的肉就是沒有生命。人的價值沒有任何東西可以替代，每個人被造都有極高的價值。這是通則，不是特例，不是死刑犯、或是戰爭。遵守神的戒命不只是在宗教中，而是在生活當中。
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How?
Obey God's command and respect each one's life.