Musar do Rodzaju 6:1

Having explained all this, we can now understand the difference between Genesis 6,1 את האלוקים התהלך נח, "Noach walked with the Lord," and Genesis 24,40 when Abraham describes himself in these words: ה' אשר התהלכתי לפניו, "G–d before Whom I walked" Noach needed G–d to "hold his hand," so to speak, whereas Abraham was self-propelled, took the initiative. Noach was afraid to mix with the corrupt society he lived in and isolated himself with only G–d as his companion because he was afraid of the possible influence on him of contemporary society. Abraham was not only confident that he would not succumb to the corrupt society around him, but he tried to lead his fellow-men back to the path of monotheism and a life of good deeds. I have elaborated on this elswewhere. This is the plain meaning of those verses.