If it fulfill the law (
ton nomon telousa). Present active participle (conditional use of the participle) of
telew, to finish, continually fulfilling to the end (as would be necessary).
Judge thee (
krinei--se). Unusual position of
se (thee) so far from the verb
krinei.
With the letter and circumcision (
dia grammato kai peritomh).
Dia means here accompanied by, with the advantage of.