The meek shall eat and be satisfied: they shall praise the LORD that seek him: your heart shall live for ever.
The meek shall eat - namely, "the meek" (or 'the poor' afflicted ones `anaawiym (H6035), in contrast to "the fat," Psalms 22:29) who shall be invited to the perpetual feast of thanksgiving that the Messiah shall at last give (Isaiah 25:6-9).
Your heart shall live for ever - not with a mere transient quickening. Whoever has thoroughly eaten of the spiritual feast of Christ shall need no other spiritual food, but through it shall be nourished unto everlasting life (John 6:51).