12 Indeed, all who desire to vlive a godly life in Christ Jesus wwill be persecuted, 13 while xevil people and impostors will go on from bad to worse, deceiving and ybeing deceived. 14 But as for you, zcontinue in what you have learned and have firmly believed, knowing from whom1 you learned it 15 and how afrom childhood you have been acquainted with bthe sacred writings, cwhich are able to make you wise for salvation through faith in Christ Jesus. 16 dAll Scripture is breathed out by God and profitable for teaching, for reproof, for correction, and for training in righteousness, 17 that ethe man of God2 may be complete, fequipped gfor every good work.
The Greek for whom is plural
That is, a messenger of God (the phrase echoes a common Old Testament expression)