world
kosmos = mankind. (See Scofield "") .

angels
(See Scofield "") .

are washed were, and so throughout the verse.
justified Justification. Galatians 2:16; Luke 18:14; Romans 3:28.

shall I
Paul does not invoke the authority of the seventh commandment, but appeals to the believer's sacredness as a member of Christ.

and in your
Some authorities end verse with "body."