Matthew Poole and continuators on 1 Peter 1:15

15 But as he that hath called you, is holy , so be ye holy in all manner of conversation .

God the Father, to whom, as the first Cause, our Calling is frequently ascribed, Rom. 9.11, 24. and 1 Cor. 7.15. Gal. 1.6, 15. It may be rendred, according to the holy One that hath called you, i. e. according to his Example; you are Children, and should therefore imitate your Father, Ephes. 5.1.

viz. Effectually, to the Knowledg and Faith of Christ.

So God is often stiled by Isaiah, and other Pen-men of the Scripture, as the Fountain and Exemplar of Holiness.

Either through the whole Course, and in the several parts of your Conversation, or in all manner of Conversation, as we read it, i. e. with whomsoever ye converse, Believers or Infidels, Friends or Enemies, Relations or Strangers; and in whatsoever Condition ye are in, Peace or Trouble, Prosperity or Adversity.