C. F. Keil and Franz Delitzsch on Proverbs 17:19

Pro 17:19 19 He loveth sin who loveth strife;      He who maketh high his doors seeketh destruction.

A synthetic distich. Böttcher finds the reason of the pairing of these two lines in the relationship between a mouth and a door (cf. Mic 7:6, פּתחי פיך). Hitzig goes further, and supposes that 19b figuratively expresses what boastfulness brings upon itself. Against Geier, Schultens, and others, who understand פּתחו directly of the mouth, he rightly remarks that הגדּיל פה is not heard of, and that הגדּיל פה taht dn would be used instead. But the two lines harmonize, without this interchangeable reference of os and ostium. Zanksucht [quarrelsomeness] and Prunksucht [ostentation] are related as the symptoms of selfishness. But both bear their sentence in themselves. He who has pleasure in quarrelling has pleasure in evil, for he commits himself to the way of great sinning, and draws others along with him; and he who cannot have the door of his house high enough and splendid enough, prepares thereby for himself, against his will, the destruction of his house. An old Hebrew proverb says, כל העוסק בבנין יתמסכן, aedificandi nimis studiosus ad mendicitatem redigitur. Both parts of this verse refer to one and the same individual, for the insanum aedificandi studium goes only too often hand in hand with unjust and heartless litigation.