[3:3] 1 tn The expression πῶς εἴληφας καὶ ἤκουσας (pw" eilhfa" kai hkousa") probably refers to the initial instruction in the Christian life they had received and been taught; this included doctrine and ethical teaching.
[3:3] 2 tn Grk “keep it,” in the sense of obeying what they had initially been taught.
[3:3] 3 tn The negation here is with οὐ μή (ou mh, the strongest possible form of negation in Koine Greek).