Follow after peace (eirēnēn diōkete). Give peace a chase as if in a hunt.
With all men (meta pantōn). Like Paul’s use of diōkō with eirēnēn in Rom 14:19 and his to ex humōn (so far as proceeds from you) in Heb 12:18. This lesson the whole world needs including Christians.
Sanctification (hagiasmon). Consecration as in 1Th 4:7; Rom 6:19, etc.
Without which (hou chōris). Ablative case of the relative with chōris (post positive here). About seeing God compare Mat 5:8 where we have katharoi.