<p>1:15 <i>But like He who called you is holy, be you yourselves holy in all manner of living- </i>This connects back to :2, which says that they had been called by God's gracious plan from the beginning, and His Spirit was at work to sanctify or make them holy. He is Holy, and His plan is to raise &quot;children of obedience&quot; (:14) like Him. Orthodox Jews such as they once were would have been obsessed with holiness in the sense of ritual separation. But this was to be extended to &quot;all manner of living&quot;. By being holy / separate over a few things, they were tempted to think that vast areas of life in other areas could be lived as they wished. This was and is the problem with legalistic obedience. Hence the focus on <i>all</i> manner of living.</p>