“He who gets wisdom loves his own soul; He who keeps understanding will find good.”
Proverbs 19:8 NKJV
Your soul is your individual (heart/mind/will/emotion)
Wisdom can be used for good or bad. Wisdom is found in Christ Jesus, “But of Him you are in Christ Jesus, who became for us wisdom from God—and righteousness and sanctification and redemption—”
I Corinthians 1:30 NKJV
The definition of wisdom is : 1. Quality of being wise; power of judging rightly and following the soundest course of action, based on knowledge, experience, understanding; good judgment 2. learning, knowledge 3. Wise discourse or teaching 4. A wise plan or course of action