Psalms 119:9 How can a young man keep his way pure? By guarding it according to your word. With my whole heart I seek you; let me not wander from your commandments! I have stored up your word in my heart, that I might not sin against you. Blessed are you, O LORD; teach me your statutes! With my lips I declare all the rules of your mouth. In the way of your testimonies I delight as much as in all riches. I will meditate on your precepts and fix my eyes on your ways. I will delight in your statutes; I will not forget your word.
The foundation for a morally pure life is found in God’s word. God’s word shows us the standard of purity, so we know what is right and what is wrong. God’s word shows us the reasons for purity, so we understand the wisdom and goodness of God’s commands. God’s word shows us the difficulty of purity, and reminds us to be on guard. God’s word shows us the blessings of purity, and gives us an incentive to make the necessary sacrifices. God’s word shows us how to be born again – converted, so our inner man may be transformed after the pattern of ultimate purity, Jesus Christ. God’s word shows us the way to be empowered by the Holy Spirit, so that we have the spiritual resources to be pure. God’s word is a refuge against temptation, giving us a way of escape in the season of enticement. God’s word is a light that clears away the deceptive fog of seduction and temptation. God’s word is a mirror that helps us see our spiritual and moral condition, and thus walk in purity. God’s word gives us wise and simple commands, such as to “Flee youthful lusts” (2 Timothy 2:22). God’s word washes us from impurity, and actually cleanses our life in a spiritual sense (Ephesians 5:26, John 15:3). God’s word is the key to the renewing of our minds, which in turn is the key to personal, moral, and spiritual transformation God’s word gives a refuge against condemnation when we have been impure, and shows us how to repent and come back to a pure life. God’s word shows us how to conduct our lives so that we are an encouragement to others in purity. (Guzik)