It is a sign. See above, Exodus 31:13. For in six days the Lord made heaven and earth. See the comment on Exodus 20:11. And was refreshed. Literally," and took breath." The metaphor is a bold one, but not bolder than others which occur in holy scripture (Psalms 44:23; Psalms 78:65). It does but carry out a little further the idea implied in God's "resting." We cannot speak of any of God's acts or attributes without anthropomorphisms.
HOMILETICS