Coffman Commentaries on the Bible - Proverbs 20:25
"It is a snare to a man rashly to say, It is holy, And after vows to make inquiry."Again, we have a proverb in which the Hebrew text, "Is not clear."[22] The `inquiry' mentioned in the second line apparently refers to a situation in which a man, after making a rash and vow, begins to seek some loophole, "So as to escape payment."[23]Sometimes, people, under a sudden impulse will make pledges for benevolent or religious purposes, which are really beyond their means; and this proverb is a warning... read more
E.W. Bullinger's Companion Bible Notes - Proverbs 20:27
spirit = breath. Hebrew. neshamah. See App-16 . candle = lamp or light. Same word as in Proverbs 20:20 . the belly. Put by Figure of speech Metalepsis ( App-6 ) for the heart, and the heart for its thoughts. read more