John Gills Exposition of the Bible Commentary - Proverbs 13:20
He that walketh with wise men shall be wise ,.... Who is a companion of them that fear the Lord; converses frequently with them in private about spiritual and experimental things, and walks with them in public in all the commandments and ordinances of the Lord; he by those means grows wiser and wiser, gains a large stock of spiritual knowledge and experience; for this holds good both in natural and spiritual wisdom, a man of any capacity at all will improve by keeping wise company; but... read more
Matthew Henry's Complete Commentary - Proverbs 13:20
Note, 1. Those that would be good must keep good company, which is an evidence for them that they would be good (men's character is known by the company they choose) and will be a means of making them good, of showing them the way and of quickening and encouraging them in it. He that would be himself wise must walk with those that are so, must choose such for his intimate acquaintance, and converse with them accordingly; must ask and receive instruction from them, and keep up pious and... read more