Because (dioti). Gives the reason (dia, oti like our "for that") for the revelation of God's wrath. That which may be known of God (to gnwston tou qeou). Verbal adjective from ginwskw, either "the known" as elsewhere in N.T. ( Acts 1:19 ; Acts 15:18 , etc.) or "the knowable" as usual in ancient Greek, that is "the knowledge" (h gnwsi) of God. See Philippians 3:8 . Cf. same use of the verbal crhston in Romans 2:4 , ametaqeton in Hebrews 6:17 . Manifest in them (paneron en autoi). In their hearts and consciences. God manifested (o qeo epanerwsen). First aorist active indicative of panerow. Not mere tautology. See Hebrews 2:14-16 .