I. The example of Jehoshaphat is a warning to us. There is something of infinitely greater consequence in the world than making a fortune. What you have to settle first and foremost is the moral basison which you are proceeding; you must get the full consent of your judgment, and heart, and conscience before you give yourself up to any commercial course. Have Godfor your Partner if you would make your business, in the highest sense of the term, honourable and successful.
II. The principle of the text is expansive enough to include other subjects of equal importance. For example, the subject of marriage is fairly within the scope of its application. "How can two walk together except they be agreed?" "What communion hath Christ with Belial?"
III. The principle of the text bears upon evil companionship generally. "My son, if sinners entice thee, consent thou not." Men cannot confederate themselves against God and succeed. Better stand alone than be found in the association of evil men. Better never hear a friendly voice than be allured by the deceit of evil men. Better be found in unpitied loneliness, yet with a conscience void of offence, than lift up our heads amongst the most influential and illustrious servants of the devil.
Parker, City Temple,1870, p. 301