John 6:53

Except ye eat (ean mh paghte). Negative condition of third class with second aorist active subjunctive of esqiw. Jesus repeats the statement in verses Ephesians 50 51 . Note change of mou (my) in verse Ephesians 51 to tou uiou tou anqrwpou with same idea. And drink his blood (kai pihte autou to aima). Same condition with second aorist active subjunctive of pinw. This addition makes the demand of Jesus seem to these Jews more impossible than before if taken in a baldly literal sense. The only possible meaning is the spiritual appropriation of Jesus Christ by faith (verse Ephesians 47 ), for "ye have not life in yourselves" (ouk ecete zwhn en eautoi). Life is found only in Christ.