The salvation of men He calls His food, shewing His great desire that we should be saved. As food is an object of desire to us, so was the salvation of men to Him. Observe, He does not express Himself directly, but figuratively; which makes some trouble necessary for His hearers, in order to comprehend His meaning, and thus gives a greater importance to that meaning when it is understood.
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Hom. xxxiv. 1