Know, to wit, practically, so as to consider and speak. Knowledge is here ascribed to the lips, as it is to the hands Psalms 78:72, because they are conducted by knowledge and wisdom. What is acceptable to God and good men, or what is truly worthy of acceptation; for this is opposed to what is froward or wicked in the next clause.
Related Commentaries of Proverbs 10:32
Proverbs 10:32
32 The lips of the righteous know what is acceptable: but the mouth of the wicked speaketh frowardness.h