Walking represents living, and usually means living according to the true things taught to us by the Lord -- to "walk in His ways." When the Lord is pictured walking, it means life itself.

8374. These things have been shown me by their spirits, and corroborated by their angels. Also therefore their spirits are not seen to be erect when they walk as others are but to be almost like swimmers in the water helping themselves along with their hands and by turns looking round.