He that getteth wisdom loveth his own soul. "Wisdom" is, in the Hebrew, leb. "heart;" it is a matter, not of intellect only. but of will and affections (see on Proverbs 15:32). Septuagint, ἀγαπᾷ ἑαυτόν, "loveth himself."
The contrary, "hateth his own soul," occurs in Proverbs 29:24. By striving to obtain wisdom a man shows that he has regard for the welfare of his soul and body. Hence St. Thomas Aquinas ('Sum. Theol.,' 1.
2, qu. 25, art. 7, quoted by Corn. a Lapide) takes occasion to demonstrate that only good men are really lovers of themselves, while evil men are practically self-haters, proving his position by a reference to Arislotle's numeration of the characteristics of friendship, which the former exhibit, and none of which the latter can possess ('Eth.
Nic.,' 9.4). He that keepeth understanding shall find good (Proverbs 16:20). A man must not only strive hard and use all available means to get wisdom and prudence, he must guard them like a precious treasure, not lose them for want of care or let them lie useless; and then he will find that they bring with themselves innumerable benefits.