For which (eis ho). The testimony of Jesus in his self-surrender (1Ti 2:6). See eis ho in 2Ti 1:11.
I was appointed (etethēn egō). First aorist passive indicative of tithēmi.
Preacher and apostle (kērux kai apostolos). In 2Ti 1:10 Paul adds didaskalos (herald, apostle, teacher) as he does here with emphasis. In Col 1:23. he has diakonos (minister). He frequently uses kērussō of himself (1Co 1:23; 1Co 9:27; Gal 2:2; Rom 10:8.).
I speak the truth, I lie not (alētheian legō, ou pseudomai). A Pauline touch (Rom 9:1). Cf. Gal 1:20; 2Co 11:31. Here alone he calls himself “a teacher of the Gentiles,” elsewhere apostle (Rom 11:13), minister (Rom 15:16), prisoner (Eph 3:1).