Charles Ellicott Commentary Proverbs 23:7

"For as he thinketh within himself, so is he: Eat and drink, saith he to thee; But his heart is not with thee." — Proverbs 23:7 (ASV)

For as he thinketh in his heart, so is he.— He is not really friendly and hospitable, as his words would imply, but he grudges every morsel you take, calculating its cost.