C. F. Keil and Franz Delitzsch on Proverbs 19:8

Pro 19:8 8 He that getteth understanding loveth his soul,    And he that values reasonableness will acquire good; or, more closely, since this would be the translation of ימצא טוב, Pro 16:20; Pro 17:20 : so it happens, or it comes to this, that he acquires good (= היה למצא); the inf. with ל is here, as at Pro 18:24, the expression of a fut. periphrasticum, as in the Lat. consecturus est. Regarding קנה־לּב, vid., Pro 15:32, and שׁמר תּבוּנה vol. i. p. 119. That the deportment of men is either care for the soul, or the contrary of that, is a thought which runs through the Book of Proverbs.