Or, a (mere) breath. So also in v. 11. In this psalm David was brought by the Lord to realize that he was nothing and vanity. Our realizing that our condition is sinful (Psa. 38) and our situation is one of vanity opens the way for Christ to crucify us and enter into us to replace us by living Himself through us and causing us to live together with Him in an organic union, as expressed by Paul in Gal. 2:20. This is the divine concept of God according to the divine revelation of the New Testament.