'Walking' in the Bible

If we say we are joined to him, and are walking still in the dark, our words are false and our acts are untrue:

But if we are walking in the light, as he is in the light, we are all united with one another, and the blood of Jesus his Son makes us clean from all sin.

But he who has hate for his brother is in the dark, walking in the dark with no knowledge of where he is going, unable to see because of the dark.