The fundamental purpose of the written Scriptures, is so that you can receive instruction. Receive, conveys the idea of intellectual reception resulting from academic teaching, and means to take possession of, or to lay hold of and own, the information being taught, within your own soul.
The instruction of wisdom, represents the self-discipline and genuine pursuit of academic training.
Instruction in justice, is a reference to the thing itself, namely Bible doctrine.
Instruction in judgment, refers to the reason and rightness of the thing being taught, namely Bible doctrine and the principles contained therein.
Instruction in equity, refers to the information being taught as being agreeable, and compatible, and consistent within the content of the Scriptures.
Therefore we do not instantly believe anything and everything that we hear, that is being said by someone else. We examine what we hear, we analyze what we hear, we ponder and consider the consistency of what we hear, and over time we can determine whether the information being taught is correct, or a bunch of hokum.
When a person is in fellowship, which means when you have confessed your sins to God the Father, as per 1 John 1:9, and God restores you to fellowship, then while in fellowship, the Holy Spirit functions as a clarifying agent with respect to the validity and truthfulness the thing being taught.
Within that operational sphere, namely fellowship, then clarity of the information being taught is much easier.
When a person is outside of fellowship, then the clarifying function of the Holy Spirit is not available, and therefore making it easy for false information and deception to enter into your thoughts.
But as we advance through the study of Proverbs, just as we have advanced through many other books within the Bible, instruction in doctrine is paramount and a requirement before one can learn and know the truths of life.
Anyone can read the Bible and learn the words and verses. But, if they read the Bible or listen to instruction outside of the spiritual process, then they will not receive spiritual benefit from the information being taught.
The spiritual process, learning doctrine while in fellowship, is the framework and environment for the success of the spiritual life.
So it is not the words themselves that bring spiritual benefit, it is the adherence and consistency of the daily study within the spiritual process, that brings spiritual benefit, spiritual growth, spiritual completeness to the individual believer.
Anyone can read, in the beginning, David and Goliath, Mary and Joseph, and so forth, but the real secret, or the real key to spiritual success is from being in fellowship, and therefore under the control of the Holy Spirit, learning the written word, and Christ is the word, and then living ones life while in that fellowship sphere.
The spiritual process is how the structure of the soul is constructed, and finished, and completed. And the soul is your life, therefore, the spiritual process is your key to a completed life.