This is the first time the important words "righteous" and "blameless" appear in the Bible. [source][source][source]
"The same explanation for Enoch"s rescue from death ("he walked with God") is made the basis for Noah"s rescue from death in the Flood: "he walked with God" ( Genesis 6:9). Thus in the story of Noah and the Flood, the author is able to repeat the lesson of Enoch: life comes through "walking with God."" [1][source]
"Noah is depicted as Adam redivivus (revived). He is the sole survivor and successor to Adam; both "walk" with God; both are the recipients of the promissory blessing; both are caretakers of the lower creatures; both father three sons; both are workers of the soil; both sin through the fruit of a tree; and both father a wicked son who is under a curse." [2][source]
"The two words, "corrupt" and "violence," give us respectively the character and expression of the sin, the cause and the effect [3]. The corruption has led to violence, for badness always leads to cruelty in one form or another. A life that is wrong with God necessarily becomes wrong with its fellows." [4][source]
"Whereas God has blessed the human family with the power of procreation to fill the earth ( Genesis 1:28; Genesis 9:1), these culprits have "filled the earth" by procreating "violence" (cf. Genesis 6:13; Ezekiel 8:17; Ezekiel 28:16)." [5][source]