God's great mercy
I, Lorena Calar, was just reading about Noah and the Ark when I came to Genesis 7:16 and 21. At the end of 16, it reads "and the Lord shut them in." Verse 21 reads "And all flesh died that moved upon the face of the earth, both of fowl, and of cattle, and of beast, and of every creeping thing that creepeth upon the earth, AND EVERY MAN (emphasis added)." If God had not sealed the Ark, His plan for cleansing the earth wouldn't have happened. If Noah had shut the door, he could have opened it to allow others in after hearing the terrifying cries and screams for help. Imagine hearing your own family members, parents, brothers, sisters, your best friend and you not being able to help them. This was not the fault of Noah nor of God. It was the fault of the the people themselves for not following the will of God.