Eph. 1:13-14

"until" is "unto"
http://bible.christiansunite.com/jfb.cgi?b=49&c=1

until Jesus returns
http://www.campuslife.utoronto.ca/groups/coc/fellowship/thisweek8a.htm

blessings are assured by presence of the Spirit--How?
http://www.open.org/~mrdsnts/d02650.htm