Labour not... but. Labour for the latter rather than for the former. Figure of speech Heterosis (of Degree). App-6.
meat. Greek brosis, the act of eating (Matthew 6:19; Matthew 6:20. "rust "). Not broma = food (John 4:34). Compare also 1 Corinthians 8:4.
endureth. Greek. meno. Same as "dwelleth", John 6:56. See note on "abode", John 1:32.
unto. Greek. eis. App-104. Not the same as in verses: John 6:5,
everlasting. Greek. aionios. See App-151.
life. Greek. zoe. See note on John 1:4, and App-170. the Son of man. See App-98.
him hath God the Father sealed. for Him (= this One) the Father, even God, sealed.
God. See App-98.
the Father. See note on John 1:14.
sealed. The Jews discussed "the seal of God", e.g. "What is the seal of the Holy, Blessed God? Rabbi Bibai answered,. Truth'. But what is 'truth'? Rabbi Bon saith,. the living God and King eternal'. Rabbi Chaninah saith.., 'truth is the seal of God'. " Babylonian Talmud, Sanhedr., quoted by Lightfoot, vol. xii, p. 291 (Pitman's ed.)