To the end that (pro to dein). With a view to the being necessary, pro and the articular infinitive. The impersonal verb dei here is in the infinitive and has another infinitive loosely connected with it proseucesqai, to pray. Not to faint (mh enkakein). Literally, not to give in to evil (en, kakew, from kako, bad or evil), to turn coward, lose heart, behave badly. A late verb used several times in the N.T. ( 2 Corinthians 4:12 Corinthians 4:16 etc.).