(Pro 4:1) Hear, ye children, the instruction of a father, and attend to know understanding.
In this verse the KJV hits the translation right on. It doesn’t need a marginal note like the NASB to tell us that “gain” (NASB) (3045) means “know” (KJV).
This is an important word in the OT. It is the Hebrew yada. It means intimate knowledge. It is the word used for the act of marriage, the ultimate human knowledge. It means going beyond superficial and easy.
The point is that we can have more than a test score or a bit of head knowledge. We can do more than quote the words. We can have them in our hearts. This is because the Eternal God sends the Holy Spirit to live in us and fill us.
So? Don’t be satisfied with being a cultural Christian. Don’t live in your parents religion. Listen to the teaching. Let God speak to you. Get to yada Him.